I ran flatpak install org.gnome.Builder on Kubuntu 25.10 before modifying and compiling a GTK3 app. Now most source code file extensions open in GNOME Builder. I'd like KDE Kate back as default to recover my preferred color scheme, custom keybinds, and VI mode. Uninstalling, then reinstalling when I want to work on GTK3 apps, is too inefficient.

Someone said to check xdg-mime query default text/plain and kcmshell6 kcm_componentchooser to set the default text editor, but it's still org.kde.kate.desktop as preferred. I was using a workaround on each of .{css,pl,sh}, right-clicking in Dolphin then going into Properties and changing the "Open with", but today I clicked on a .c file and decided I've had enough.

I'm about to split and loop through grep MimeType= /var/lib/flatpak/exports/share/applications/org.gnome.Builder.desktop to run xdg-mime default org.kde.Kate.desktop "$x", but this might not persist if a GNOME Builder update adds more MIME types. Which command can permanently prevent any specified application from being the first entry in Dolphin's "Open with" list and used by xdg-open?

I tried to download google chrome from the official website and it downloaded two files. One says "google-chrome-stable_current_amd64.5WU9-pa5.deb.part" which, when I try to open, says "there is no app installed for partially downloaded files" files" and the other says "google-chrome-stable_current_amd64.deb" and opens the text editor. Am I supposed to type something there? I don't really understand computers, so any help would be appreciated.

We are currently using Ubuntu systems in our environment and would like to implement device control measures to prevent users from copying or transferring data using external storage devices such as USB drives (pen drives).

We have evaluated several endpoint security solutions; however, none of them seem to provide a complete and reliable solution, as each has certain limitations.

Could you please confirm whether it is possible to enforce such restrictions on Ubuntu systems? If yes, we would appreciate detailed guidance on how this can be implemented effectively.

Wine is installed from a different repo (WineHQ) for different versions of Ubuntu. If I'm running Ubuntu Jammy (22.04), will updating to Ubuntu Noble (24.04) break my Wine installation?

I am partway through following the instructions in Upgrade Ubuntu Desktop for 24.04 LTS. The problem arises when running 'sudo do-release-upgrade' where it issues an error saying that the error usually occurs with a network error/bad internet connect. I've check the internet which is fine and the error repeats.

I am also having issues accessing GRUB.

Please could you suggest how to troubleshoot?

Ps. I also have a Dell which is mentioned in this thread

I am unable to boot into Ubuntu 24.04. The boot process hangs with the following error: nouveau 0000:01:00.0: bus: MMIO write of 00014c70 FAULT at 100c10 . Its because of the nvidia card. How can I bypass this driver fault to install the proprietary Nvidia drivers?

I have already tried the nomodeset in the grub, but after i save and i reboot nothing happens and when i check on the grub again i find that the nomodeset was deleted like i didnt add it at all.

I'm using Ubuntu with a Sun Type 7 Unix keyboard since years. My Keyboard setting is "English (US, Sun Type 6/7)". As a German I'm very often using the Compose Key to write German diacritic characters like äöü and others. I'm also naming files using diacritics.

Recently I’ve upgraded my system from 22.4 to 24.4. Since then "Files" shows a strange behaviour when renaming a file using the compose-key to create a diacritic in a file name. In addition to the desired diacritic character always the accent-sign used to compose the diacritics is shown travelling right while typing more characters. However, when pressing enter to finally rename the file the extra accent does not appear in the new file name. Using the back-space key while typing to get rid of that travelling accent deletes not only the accent but also the last character typed. The same happens when creating a new folder while typing the new folder name. However, it does not happen in Gedit while typing text. Also other applications like firefox, libreoffice, etc. are not affected.

I'm aware that this is a minor flaw. Nevertheless, I wanted to make it known to the community. Maybe a gnome/nautilus developer has a clue what's wrong.

Ubuntu 25.10, Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 05)

When waking up my computer by pressing a key on the keyboard after suspend, it takes from 2 to 10 minutes for the screen to lit up.

I am welcomed with this screen for about 5 seconds

Then I finally enter gnome, however my wired connection is unavailable.

Everything is fine if I boot from cold, it only happens after suspend.

Do note that I had to install r8125-dkms to make the wired connection work in the first place.

EDIT:

$ sudo lspci -knn|grep -i realtek -A5
06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 05)
DeviceName: RTL8125 2.5GbE Controller
Subsystem: ASUSTeK Computer Inc. Device [1043:87d7]
Kernel driver in use: r8125
Kernel modules: r8125

and

$ grep 8169 /etc/modprobe.d/*

returns nothing.

I also noticed longer boot and stop times, when I boot I can see for a few seconds this line:

r8125 0000:06:00.0 (unnamed net_device) (uninitialized): Invalid ether addr 00:00:00:00:00:00

EDIT2:

$ dpkg -l linux-firmware
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version                         Architecture Description
+++-==============-===============================-============-=================================
ii  linux-firmware 20250901.git993ff19b-0ubuntu1.9 all          Firmware for Linux kernel drivers

$ sudo apt install linux-firmware
linux-firmware is already the newest version (20250901.git993ff19b-0ubuntu1.9).
Summary:                    
  Upgrading: 0, Installing: 0, Removing: 0, Not Upgrading: 3

.

$ sudo apt purge r8125-dkms
...
Removing r8125-dkms (9.016.01-1) ...
Module r8125/9.016.01 for kernel 6.8.0-58-generic (x86_64):
Before uninstall, this module version was ACTIVE on this kernel.
Deleting /lib/modules/6.8.0-58-generic/updates/dkms/r8125.ko
Running depmod... done.

Module r8125/9.016.01 for kernel 6.17.0-14-generic (x86_64):
Before uninstall, this module version was ACTIVE on this kernel.
Deleting /lib/modules/6.17.0-14-generic/updates/dkms/r8125.ko.zst
Running depmod... done.

Module r8125/9.016.01 for kernel 6.17.0-19-generic (x86_64):
Before uninstall, this module version was ACTIVE on this kernel.
Deleting /lib/modules/6.17.0-19-generic/updates/dkms/r8125.ko.zst
Running depmod... done.

Deleting module r8125/9.016.01 completely from the DKMS tree.
Processing triggers for dracut (108-3ubuntu3) ...
update-initramfs: Generating /boot/initrd.img-6.17.0-19-generic
$ dkms status
nothing here related to ethernet
$ reboot
$ sudo lspci -knn|grep -i realtek -A5
06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 05)
    Subsystem: ASUSTeK Computer Inc. Device [1043:87d7]

No ethernet connection, no network interface related to ethernet shows up.

New (refurb) Windows Dell Optiplex. Clean install dual-boot Ubuntu 24.04.4 LTS. Attached printer Brother HL2135W. Installed drivers as per Brother instructions. A printed document appears on the print queue, but is paused. I click the print button but it still won't print - just returns to paused. Brother Linux download page only has RPM and DEB options, tried both. The same printer worked on my previous system, which was identical.

Any ideas, please?

I am using KDE Plasma in Kubuntu 24.04.

I have enabled Screen Edges to show the desktop, which minimizes all the running apps.

After I click on an app at this point, this maximizes all the other apps.

In Windows, or in Cinnamon, the behavior is, only the app which is opened is shown, all other apps stay minimized. How to enable this behavior in KDE Plasma?

I recently got an old Dell Optiplex 3040 Slim and tried installing Ubuntu using a bootable USB. It was fully installed, and after it was done it asked for me to reboot the computer and the installation will be completed, however after the reboot a black screen with this error message was the only thing that showed up:

[    0.075628] DMAR: [Firmware Bug]: No firmware reserved region can cover this 
RMRR[0×00000000₫₫800000-0×0000000fffff], contact BIOS vendor for fixes
[    0.099816] x86/cpu: SGX disabled by BIOS.
/dev/sda3: recovering journal
/dev/sda3: clean, 176110/61022208 files, 7251929/244058624 blocks
_  

I'm working remotely via SSH connection and need to use some GUI applications on the remote machine. I do not have an X-Server for X forwarding on my local machine, but a RDP client.

Can I somehow enable RDP via command line?

Usually one would do this in the Settings app in the "Sharing" tab.

My grandfather is an engineer and has ran Ubuntu on many of his computers for years. He found this computer and refurbished it with 8 GB RAM and an amazing battery, and got it to run Ubuntu. I have had it for about a year and was using it for about 2 months and then got busy and didn't go on it again. When I went to go on the computer again to go through the VirtualBox and run Acid Pro, after loading the Dell logo, it shows this:

error: hd0 disk gpt3 not found.  
Press any key to continue... 

I pressed Enter and it output this kernel panic message:

[    0.294780] /dev/root: Can't open blockdev
[    0.297696] Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block (0,0)
[    0.297717] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 6.2.0-26-generic #26~22.04.1-Ubuntu
[    0.297737] Hardware name: Dell Inc. Precision M4800/0V5GVY, BIOS A26 06/13/2019
[    0.297755] Call Trace:
[    0.297762] <TASK>
[    0.297769] dump_stack_lvl+0x48/0x70
[    0.297782] dump_stack+0x10/0x20
[    0.297792] panic+0x35a/0x3a0
[    0.297804] mount_block_root+0x27b/0x280
[    0.297817] mount_root+0x83/0xb0
[    0.297826] prepare_namespace+oxf5/0x200
[    0.297837] kernel_init_freeable+0x*1c1/0x200
[    0.297849] ? __pfx_kernel_init+0x10/0x10
[    0.297861] kernel_init+0x1b/0x200
[    0.297871] ? __pfx_kernel_init+0x10/0x10
[    0.297882] ret_from_fork+0x2c/0x50
[    0.297893] </TASK>
[    0.298163] Kernel Offset: 0x2000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[    0.298195] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---

I have gone to the GNU GRUB menu by clicking escape until it loads which from there I do not know what to do. I have also clicked f2 and that takes me to setup, where I do not want to click around much as I am not sure what I am doing at all.

I then found to click f12 which takes me to the one time boot menu. There is shows me that my Boot mode is set to UEFI with Secure Boot enable. Which I found in the GNU GRUB menu it would not allow me to input any commands due to secure boot being on, however I know my grandfather put that on there for a reason so I do not want to change anything unless I know for sure that it will fix the problem.

In the boot menu it gives me these options:

UEFI boot:

• Ubuntu

• Windows Boot Manager

• UEFI: WD Blue SA510 2.5 1000GB

Other options:

• BIOS setup

• BIOS flash update

• Diagnostics

• Change boot mode settings

I have done lots of research looking at various Linux websites, Reddit posts, Ubuntu forums and even Dell itself, but nothing seems to work.

I am assuming it has to do with it not having the USB flash drive with it to access the Operating System for Ubuntu, I vaguely remember him having on when setting it up. The issue with that is he has over 2 dozen different flash drives and I do not remember which one it was, and considering the circumstances I don't want to ask him because if it is wrong due to memory, I don't want to accidentally mess up the computer by plugging the wrong one into it.

Is there any way to fix the inability to boot due to the kernel panic? What can I do here? I have never used computers or know how to code but I am really determined to get this to work. Any help please, I am even considering downloading Ubuntu on the computer I am using now, but I don't want to lose the other one because there was so much work that he put into it and it is very important. Could I take the computer in to someone and they be able to fix it possibly?

For some reason # 297762 and # 297893 won't appear, but it says: <TASK>

I have an Acer Aspire 5 with Windows 11. I tried to install Ubuntu new version but I have reached this error:

sgx disabled by bios

The Ubuntu installer boots to a black screen:

[    0.144634] x86/cpu: SGX disabled by BIOS.

BusyBox v1.30.1 (Ubuntu 1:1.30.1-7ubuntu3) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs) exit
cp: can't create '/root/var/log/': Is a directory
cp: can't create '/root/etc/': Is a directory
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /run on /root/run failed: No such file or directory
run-init: can't execute '/sbin/init': No such file or directory
Target filesystem doesn't have requested /sbin/init.
run-init: can't execute '/sbin/init': No such file or directory
run-init: can't execute '/etc/init': No such file or directory
run-init: can't execute '/bin/init': No such file or directory
run-init: can't execute '/bin/sh': No such file or directory
run-init: can't execute '': No such file or directory
No init found. Try passing init= bootarg.


BusyBox v1.30.1 (Ubuntu 1:1.30.1-7ubuntu3) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs) _

I am aware that there are questions similar to mine, but after spending hours reviewing each one (and the answers provided), I was still unable to find a solution that worked for me. I think this is because I am using VirtualBox and am unable to access the right terminal for my VirtualBox machine in order to try out the solutions for the specific kernel error that I am having issues with. I think this because none of the fdisk commands are working on the terminal that I am on.

As stated in the title, I am trying to install and run Ubuntu on Oracle VirtualBox. I have ran into numerous problems and was able to fix them all, however I am clueless as to what to do to fix the aforementioned kernel panic error.

Before this error, I got another kernel panic that was about idle kill or something along those lines and I think changing my processors to 2 fixed that error. Prior to the idle kill kernel panic error, there was another error about my Windows Hypervisor Platform settings which I changed using both the "Turn Windows Features On or Of" GUI and the Windows PowerShell terminal (In accordance with the tutorial I was watching). Although these problems may sound simple, they took about a half a day altogether for me to fix.

Now I am facing a kernel panic Unable to mount root fs on unknown block(0,0) error message when trying to install and run Ubuntu on VirtualBox. As far as I can tell, every single solution to this error online requires you access the terminal of the machine you are trying to install the operating system on (note that I am using VirtualBox), and input some fdisk commands.

I have spent over a day trying to access this terminal and just figured it out, but now I am faced with the issue of the fdisk commands not working on the terminal that I am on. To access the terminal, I go to the advanced options for Ubuntu which brings me to the GNU GRUB page and then press c.

Kernel panic:

[  0.639616] Hardware name: Innotek GmbH VirtualBox/VirtualBox, BIOS 
VirtualBox 12/01/2006
[  0.639968] Call Trace:
[  0.640155]  <TASK>
[  0.640289]  show_stack+0x52/0x69
[  0.640475]  dump_stack_lvl+0x49/0x6d
[  0.640669]  dump_stack+0x10/0x18
[  0.640848]  panic+0x162/0x316
[  0.641018]  mount_block_root+0x144/0x1ea
[  0.641323]  mount_root+0x62/0x6e
[  0.641507]  prepare_namespace+0x13f/0x19e
[  0.641719]  kernel_init_freeable+0x120/0x139
[  0.642011]  ? rest_init+0x100/0x100
[  0.642233]  kernel_init+0x1b/0x170
[  0.642424]  ? rest_init+0x100/0x100
[  0.642615]  ret_from_fork+0x22/0x30
[  0.642809]  </TASK>
[  0.643140] Kernel Offset: 0x2a400000 from 0xffffffff81000000 (relocation 
range: 0xffffffff80000000-0xffffffffbfffffff)
[  0.643583] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs
on unknown-block(0,0) ]---

GRUB boot menu:

This brings me to a grub prompt:

                           GNU GRUB version 2.06

   Minimal BASH-like line editing is supported. For the first word, 
   TAB lists possible command completions. Anywhere else TAB lists 
   possible device or file completions. ESC at any time exits.

grub> _

Currently running Ubuntu 22.04.2* LTS. Clearly there's a fingerprint device on my machine:

Bus 003 Device 003: ID 04f3:0c4c Elan Microelectronics Corp. ELAN:ARM-M4

And after I run the command:

sudo service fprintd status

I get the following message telling me that the service is currently active and running:

● fprintd.service - Fingerprint Authentication Daemon
     Loaded: loaded (/lib/systemd/system/fprintd.service; static)
     Active: active (running) since Tue 2023-03-07 20:35:26 WET; 9s ago
       Docs: man:fprintd(1)
   Main PID: 4381 (fprintd)
      Tasks: 5 (limit: 18842)
     Memory: 1.5M
        CPU: 51ms
     CGroup: /system.slice/fprintd.service
             └─4381 /usr/libexec/fprintd

HP-ENVY-x360-Convertible-15-es1xxx systemd[1]: Starting Fingerprint Authentication Daemon...
HP-ENVY-x360-Convertible-15-es1xxx systemd[1]: Started Fingerprint Authentication Daemon.

But when I run the final command to setup the fingerprint:

fprintd-enroll -f right-index-finger

I get the following error message:

Impossible to enroll: GDBus.Error:net.reactivated.Fprint.Error.NoSuchDevice: No devices available

Any help is appreciated. I'm open to providing more information if required.

I was doing an Ubuntu update. After rebooting the Ubuntu PC it stopped working. I was seeing this kernel panic:

[    0.039443] [Firmware Bug]): TSC DEADLINE disabled due to Errata: please update microcode to version: 0x25 (or later) 
[    0.122732] DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR 
[0x0000000094800000-0x000000009fffffffl, contact BIOS vendor for fixes
[    0.979379] Kernel panic- not syncing: 
UFS: Unable to mount root fs on unknown-block(0,0) 0.9794241 CPU: PID: 1 Comm: swapper/8 Tainted: G
I 5.15.0-52-generic #58-Ubuntu
[    0.979469] Hardware name: TOSHIBA SATELLITE L50-B/Type2 - Board Product Mode1, BIOS 2.08 12/02/2014 0.9795121 Call Trace:
[    0.979526] <TASK>
[    0.979542] show_stack+0x52/8x5c
[    0.979564] dump_stack_lul+0x4a/8x63
[    0.979587] dump_stack+0x18/8x16  
[    0.979606] panic+0x149/8x321
[    0.979626] mount_block_root+0x144/0x1dd
[    0.979651] mount root+0x10c/0x11c
[    0.979671] prepare_namespace+0x13f/0x191 E 0.979695) kernel_init_freeable+0x18c/0x1b5
[    0.979721] ? rest_init 0x100/0x100 0.9797433 kernel_init 8x1b/0x150
[    0.975764] ? rest_init 0x100/0x100
[    0.979785] ret_from_fork+0x22/0x30
[    0.979888] <TASK>
[    0.979842] Kernel Offset: 0x24a00000 from exffffffff81000000 (relocation range: 0xffffffff80000000-0xfff
[    0.979894] -end Kernel panic - not syncing: 
UFS: Unable to mount root fs on unknown-block(0,0) ]——

I tried to solve it with some commands found on the forums, but after some tests now I can't use nothing.( 5.x-generic, 4.x-generic or recovery mode). I believe the 5.x-generic stopped working after I used commands on initramfs. (If I remember correctly, after launching these instructions I received an error "failed for too many errors"). I had found some command to update microcode, but now I can no longer use the terminal.

What should I do? Currently I can start Windows with the dual boot. Can I do something from there possibly? What should I do to recover the files I had on Ubuntu? Can I possibly reinstall Ubuntu from Windows without losing my files?

I got this error while plugging an Ubuntu virtual machine

[   15.728005] ffffffff81c03eb8 ffffffff810bd3ea ffffffff81c03f18 ffffffff810bd729
[   15.731036] ffffffff81c00000 ffffffff81c04000 25083f9c7819ef8f 53aa515164b19fca
[   15.733875] Call Trace:
[   15.734706]  [<ffffffff8101f94f>] arch_cpu_idle+0xf/0x20
[   15.736286]  [<ffffffff810bd3ea>] default_idle_call+0x2a/0x40
[   15.737926]  [<ffffffff810bd729>] cpu_startup_entry+0x2c9/0x320
[   15.739661]  [<ffffffff817dd16c>] rest_init+0x7c/0x80
[   15.741598]  [<ffffffff81d50025>] start_kernel+0x48b/0x4ac
[   15.743212]  [<ffffffff81d4f120>] ? early_idt_handler_array+0x120/0x120
[   15.745150]  [<ffffffff81d4f339>] x86_64_start_reservations+0x2a/0x2c
[   15.747141]  [<ffffffff81d4f485>] x86_64_start_kernel+0x14a/0x16d
[   15.748898] Code: 0f ae f0 65 48 8b 04 25 44 3b 01 00 0f ae b8 08 c0 ff ff 0f
ae f0 31 d2 65 48 8b 34 25 44 3b 01 00 48 89 d1 48 8d 86 08 c0 ff ff <0f> 01 c8
48 8b 86 08 c0 ff ff a8 08 0f 85 a5 00 00 00 31 c0 fb
[   15.764394] RIP  [<ffffffff8101f394>] mwait_idle+0x74/0x140
[   15.766196]  RSP <ffffffff81c03e88>
[   15.767302] ---[ end trace e26ffdf f12e1e547 ]---
[   15.768728] Kernel panic - not syncing: Attempted to kill the idle task!
[   15.771125] Kernel Offset: disabled
[   15.772205] ---[ end Kernel panic - not syncing: Attempted to kill the idle 
task!

I know that some had the same problem, but with different codes. I've been searching the internet to find a solution, but I couldn't find any.

I'm trying to install Lubuntu and I keep getting a Kernel panic - not syncing: attempted to kill init! exitcode=0x00000009. I know that it isn't my disk or the distro, because I tried with a DVD and Xubuntu and the same thing happened.

I'm trying to install Linux over my previous Windows 7 (not as dual boot. I plan to erase the entire disk and install just the Linux, as I don't need that Windows anymore. I already backed up my files, etc.) I want to live with this new OS and also to learn more of programming, Linux, etc.

I'm sure my hardware can run Lubuntu even though it's an old 32-bit computer (I'm running the 18.04 which supports x32) or if it's that it already has Windows 7 installed on the machine (though I don't think that this should've been a problem from what I searched).

[  0.635454] ? pci_pcbios_init+0x16f/0x247
[  0.635485] ? pci_bios_resource_survey+0x68/0x68
[  0.635517] pci_arch_init+0x2c/0x6b
[  0.635549] do_one_initcall+0x42/0x1d4
[  0.635581] ? set_debug_rodata+0x14/0x14
[  0.635613] kernel_init_freeable+0x163/0x1e1
[  0.635645] ? rest_init+0xa0/0xa0
[  0.635685] kernel_init+0xd/0x100
[  0.635724] ret_from through lunch_fork+0x2e/0x38
[  0.635763] Modules linked in:
[  0.635802] CR2: 0000000000000600
[  0.635846] ---[ end trace e179bf5860a5b097 ]---
[  0.635885] EIP: 0xc00f0496
[  0.635923] Code: 10 66 8b c7 8a e3 24 fc 66 ba f8 0c 66 9c fa ef 66 8b d7 6
83 e2 03 66 81 c2 fc 0c 66 81 fe 00 ff 75 05 ec 8a c8 eb 11 66 81 <fe> 01 ff 7
07 66 ed 66 8b c8 eb 03 ed 8b c8 66 9d 66 5a 58 f8 c3
[  0.635998] EAX: 00000001 EBX: 000f0008 ECX: 00000600 EDX: 0000ff00
[  0.636040] ESI: 0000b101 EDI: ddd3000a EBP: f2551f18 ESP: f2551ee0
[  0.636081] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010002
[  0.636123] CR0: 80050033 CR2: 00000600 CR3: 1dfd2000 CR4: 000406f0
[  0.636168] Kernel panic - not syncing: Attempted to kill init!   
exitcode=0x00000009
[  0.636230] ---[ end Kernel panic - not syncing: Attempted to kill init! 
exitcode=0x00000009 ]---

I can't even try it without installing it. I can't do anything except boot to the basic main menu from Lubuntu (which is something at least, as with Xubuntu I couldn't even boot to the menu).

I'm following this guide but using all task when I try to run the deploy the issue I get a kernel panic. My lab is based on Ubuntu 20.04 and MAAS 2.7.0

[  1.030098] VFS: Cannot open root device "squash:[http://10.0.0.10:5248/images](https://www.google.com/search?q=http://10.0.0.10:5248/images)
/ubuntu/amd64/ga-20.04/focal" or unknown-block(0,0): error -6
[  1.031302] Please append a correct "root=" boot option; here are the   
available partitions:
[  1.032254] Kernel panic - not syncing: VFS: Unable to mount root fs on  
unknown-block(0,0)
[  1.033143] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.0-29-generic #33-Ubuntu  
[  1.033988] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1
ubuntu1 04/01/2014
[  1.034913] Call Trace:
[  1.035359]  dump_stack+0x6d/0x9a
[  1.035825]  panic+0x101/0x2e3
[  1.038432]  mount_block_root+0x23f/0x2e8
[  1.039022]  mount_root+0x38/0x3a
[  1.039490]  prepare_namespace+0x13f/0x194
[  1.039986]  kernel_init_freeable+0x231/0x255
[  1.040526]  ? rest_init+0xb0/0xb0
[  1.041007]  kernel_init+0xe/0x100
[  1.041472]  ret_from_fork+0x35/0x40
[  1.042045] Kernel Offset: 0x18000000 from 0xffffffff81000000 (relocation  
We are reallyrange: 0xffffffff80000000-0xffffffffbfffffff)
[  1.043107] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs
on unknown-block(0,0) ]---
_

I have dual boot system with Windows and Ubuntu.

• Distributor ID: Ubuntu
• Description: Ubuntu 18.04.3 LTS
• Release: 18.04
• Codename: bionic

All of a sudden my Ubuntu terminal crashed and won't start, so I did a system reboot, but now on system reboot I am getting end Kernel panic- not syncing: Attempted to kill init! exit code=0x00000100.

[    2.604568] CPU: 0 PID: 1 Comm: run-init Not tainted 5.3.0-28-generic #30~18.
04.1-Ubuntu
[    2.604680] Hardware name: Dell Inc. Latitude E5470/0MT53G, BIOS 1.5.0 04/22/
2016
[    2.604789] Call Trace:
[    2.604879]  dump_stack+0x6d/0x95
[    2.604971]  panic+0xfe/0x2d4
[    2.605057]  do_exit+0xb9f/0xba0
[    2.605144]  __x64_sys_exit+0x1b/0x20
[    2.605233]  do_syscall_64+0x5a/0x130
[    2.605403]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    2.605494] RIP: 0033:0x20d459
[    2.605581] Code: Bad RIP value.
[    2.605668] RSP: 002b:00007ffc8f3a8988 EFLAGS: 00000246 ORIG_RAX: 0000000000
0003c
[    2.605778] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000020d459
[    2.605872] RDX: 00007f4d498a2120 RSI: 0000000000000000 RDI: 0000000000000001
[    2.605967] RBP: 0000000000000001 R08: 000000000020d4b0 R09: 00007f4d498a000
[    2.606061] R10: 000000000020d459 R11: 0000000000000246 R12: 00007ffc8f3a89e8
[    2.606155] R13: 00000000004001ba R14: 0000000000000000 R15: 0000000000000000
[    2.606296] Kernel Offset: 0x1cc00000 from 0xffffffff81000000 (relocation ran
ge: 0xffffffff80000000-0xffffffffbfffffff)
[    2.606439] ---[ end Kernel panic - not syncing: Attempted to kill init! exit
_
code=0x00000100 ]---
[    2.604568] CPU: 0 PID: 1 Comm: run-init Not tainted 5.3.0-28-generic #30~18.
04.1-Ubuntu
[    2.604680] Hardware name: Dell Inc. Latitude E5470/0MT53G, BIOS 1.5.0 04/22/
2016
[    2.604789] Call Trace:
[    2.604879]  dump_stack+0x6d/0x95
[    2.604971]  panic+0xfe/0x2d4
[    2.605057]  do_exit+0xb9f/0xba0
[    2.605144]  __x64_sys_exit+0x1b/0x20
[    2.605233]  do_syscall_64+0x5a/0x130
[    2.605403]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    2.605494] RIP: 0033:0x20d459
[    2.605581] Code: Bad RIP value.
[    2.605668] RSP: 002b:00007ffc8f3a8988 EFLAGS: 00000246 ORIG_RAX: 0000000000
0003c
[    2.605778] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000020d459
[    2.605872] RDX: 00007f4d498a2120 RSI: 0000000000000000 RDI: 0000000000000001
[    2.605967] RBP: 0000000000000001 R08: 000000000020d4b0 R09: 00007f4d498a000
[    2.606061] R10: 000000000020d459 R11: 0000000000000246 R12: 00007ffc8f3a89e8
[    2.606155] R13: 00000000004001ba R14: 0000000000000000 R15: 0000000000000000
[    2.606296] Kernel Offset: 0x1cc00000 from 0xffffffff81000000 (relocation ran
ge: 0xffffffff80000000-0xffffffffbfffffff)
[    2.606439] ---[ end Kernel panic - not syncing: Attempted to kill init! exit
code=0x00000100 ]---
_

How can I start my system without losing any data?

I tried to boot into Ubuntu 18.04 today, but when it was starting up and all the output was running by it declared a kernel error and froze. The only way I could get out was by holding the power button down for about ten seconds to shut the computer down. I think I might be able to fix the problem if I can get on Ubuntu or even into recovery mode, but I can't do either. I have had Ubuntu for almost nine months and have never had this problem before.

The last time I was on the system it worked normally and I didn't do anything major. The only change I have made to any system that is even related to boot since I was last on was to change the default boot value in the Grub menu. I have a dual boot of Kali Linux (I am using the Kali Grub menu) and Windows 10 (which I am currently on) on the same system, but they have both been working fine. Before the kernel error the output said something like:

[Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x22 (or later)

Kernel panic - not syncing:

[    0.000000] [Firmware Bug]: TSC_DEADLINE disabled due to Errata; 
please update microcode to version: 0x22 (or later)
[    0.103926] pnp 00:01: can't evaluate _CRS: 12311
[    0.368556] tpm tpm0: A TPM error (7) occurred attempting to read a pcr value
[    0.437763] Couldn't get size: 0x800000000000000e
[    0.459933] tpm tpm0: A TPM error (7) occurred attempting to read a pcr value
[    0.468343] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    0.468368] CPU: 7 PID: 1 Comm: swapper/0 Not tainted 4.15.0-42-generic #45-Ubuntu
[    0.468386] Hardware name: Hewlett-Packard HP EliteDesk 800 G1 TWR/18E4, BIOS L01 v02.73 01/22/2018
[    0.468407] Call Trace:
[    0.468420]  dump_stack+0x63/0x8b
[    0.468432]  panic+0xe4/0x244
[    0.468444]  mount_block_root+0x1f6/0x2da
[    0.468455]  ? set_debug_rodata+0x17/0x17
[    0.468466]  mount_root+0x38/0x3a
[    0.468475]  prepare_namespace+0x139/0x18e
[    0.468487]  kernel_init_freeable+0x224/0x251
[    0.468500]  ? rest_init+0xb0/0xb0
[    0.468510]  kernel_init+0xe/0x110
[    0.468522]  ret_from_fork+0x35/0x40
[    0.468559] Kernel Offset: 0x14c00000 from 0xffffffff81000000 (relocation range: 0xffffffff800000
00-0xffffffffbfffffff)
[    0.468585] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)  
_

The system also kept talking about the VFS but I don't know why because in BIOS the VFS tab is blanked out and it has never had a problem before.

My problem is not a duplicate of this issue because I am stuck outside of my system, not just reading the logs through: [Firmware Bug]: TSC_DEADLINE disabled due to Errata - what should I do about this?

I have a vnc system, I was able to build. It leverages the classic gnome desktop GUI.

I would like to upgrade the .vnc/xstartups file, to use the newest Gnome Desktop Environment. The Ubuntu Gnome Desktop featured as the official Ubuntu 18.04 desktop.

Here is my current ~/.vnc/xstartups file.

#!/bin/sh

export XKL_XMODMAP_DISABLE=1
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS

[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
gnome-session &
gnome-panel &
gnome-settings-daemon &
metacity &
gnome-terminal &

Thank you, please keep the comments and answer to the topic.

• This question assumes a working VNC connection, with no errors.
• This question is specific, as in no question to the purpose of this is necessary, I believe it's clear that the point is to have a newer GUI desktop environment.
• If you don't know (A.K.A. "It's not possible"), join the club. Let's wait, for the person who does know how, to give the answer.

Any help is appreciated.

I downloaded the zip file from http://www.exodus.io/releases/. Then I unzipped it using:

unzip exodus-linux-x64-1.40.0.zip

./Exodus

./Exodus: error while loading shared libraries: libgconf-2.so.4: cannot open shared object file: No such file or directory

I was running Xubuntu 14.04 LTS, and received 16.04.1 upgrade notify recently, so I did an upgrade.

During the upgrade process some error prompted that "init" does not found or something, but I didn't pay much attention (plus it only gives me a "close" button).

The first time upgrade process tried to reboot, it stops at a blank screen with a non-blinking cursor on upper left. After waiting for quite some time, I did a hard reboot, and then my system hangs at here:

fsck from util-linux 2.27
/dev/sda1: recovering journal
/dev/sda1: clean, 1634639/3907584 files, 7381910/15630336 blocks
Target filesystem doesn't have requested /sbin/init.
/bin/sh: 0: Can't open splash
[    2.647071] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00
[    2.647071]
[    2.647105] CPU: 0 PID: 1 Comm: sh Not tainted 4.2.0-16-generic \#19-Ubuntu
[    2.647127] Hardware name: MECHREVO MR-UX7/MR-UX7, BIOS E1771IT2.50F 03/17/2014
[    2.647151]  0000000000000000 0000000070693062 ffff880226187e08 ffffffff817e8c09
[    2.647183]  0000000000000000 ffffffff81a990c8 ffff880226187e88 ffffffff817e5f9b
[    2.647213]  ffffffff00000010 ffff880226187e98 ffff880226187e38 0000000070693062
[    2.647243] Call Trace:
[    2.647258]  [<ffffffff817e8c09>] dump_stack+0x45/0x57
[    2.647276]  [<ffffffff817e5f9b>] panic+0xce/0x206
[    2.647296]  [<ffffffff8107e2d7>] do_exit+0xb07/0xb10
[    2.647315]  [<ffffffff811fd2a6>] ? vfs_write+0x146/0x1a0
[    2.647335]  [<ffffffff8107e373>] do_group_exit+0x43/0xb0
[    2.647356]  [<ffffffff8107e3f4>] SyS_exit_group+0x14/0x20
[    2.647377]  [<ffffffff817ef9f2>] entry_SYSCALL_64_fastpath+0x16/0x75
[    2.647420] Kernel Offset: disabled
[    2.647433] drm_kms_helper: panic occurred, switching back to text console
[    2.647468] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00
[    2.647468]
_

Target filesystem doesn't have requested /sbin/init
Kernel panic - not syncing: Attempted to kill init! exitcode=`0x00007f00

In GRUB's advance menu I can choose these entries:

• default, which actually is systemd;

• systemd;

• upstart, which boots into Xubuntu's GUI loading screen, but just that. Pressing Esc and I can see that it stops at

Starting cups-browsed - Bonjour remote printer browsing daemon [ OK ]

NumLock works, cursor blinking, but nothing else;

• recovery_mode, which boots exactly like systemd

Choosing older kernels in GRUB's advance option doesn't make any better: for systemd or recovery-mode they didn't make any difference; for upstart they stops at a black-and-white screen loading 15.10 (which I never installed).

I've read question #651974, question #92946, but it doesn't seem to help.

Someone already posted a similar question with no answer (currently).

Anyway to fix this?

As the title states the mouse cursor on my laptop isn't moving but the mouse buttons still work. I'm not sure what to do. I have tested the touchpad on Windows and it works fine.

My laptop is a HP Envy

Xinput output xinput list

Virtual core pointer    id=2 [master pointer (3)]
Virtual core XTEST pointer    id =4 [slave pointer (2)]
SynPS/2 synaptics TouchPad id=12 [slave pointer (2)]

uname -r

3.16.0-49-generic

lspci -K | grep -EA2 'VGA|3D'

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
    Subsystem: Hewlett-Packard Company Device 1966
    Kernel driver in use: i915

01:00.0 3D controller: NVIDIA Corporation GK208M [Geoforce GT 740M] (rev a1)
    Subsystem: Hewlett-Packard company device 219c

lspci -k | grep -EA2 'VGA|3D' after driver install

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
    Subsystem: Hewlett-Packard Company Device 1966
    Kernel driver in use: i915

01:00.0 3D controller: NVIDIA Corporation GK208M [Geoforce GT 740M] (rev a1)
    Subsystem: Hewlett-Packard company device 219c
    Kernel driver in use: nvidia

Edit

Turns out that a USB Mouse does work but I have yet to find out why my TrackPad stopped working.

Is there a list of Ubuntu versions with default corresponding Linux kernel versions somewhere?

I would specifically like to know the most recent version of Ubuntu that still used Linux Kernel 2.x.

My parents got this error on their machine, so I'm not sure what triggered it. My dad says it just happens randomly. It apparently happens every couple of days, but this is the first time I've been told about it. The computer is pretty old and is low on hard drive space, which I think might be the issue.

Here's the entire output including a kernel panic at the end:

... not write bytes: Broken pipe
Checking battery state...
[ 764.574944] general protection fault: 0000 [#1] SMP
[ 764.574986] Modules linked in: bnep(F) rfcomm(F) bluetooth(F) snd_hda_codec_realtek(F) snd_hda_intel(F) snd_hda_codec(F) uvcvideo(F) snd_usb_audio(F) i915(F)
nd_usbmidi_lib(F) coretemp(F) videodev(F) snd_seq_midi(F) videobuf2_vmalloc(F) snd_seq_midi_event(F) videobuf2_memops(F) snd_seq(F) drm_kms_helper(F) snd_ra
nd_seq_device(F) gpio_ich(F) psmouse(F) ppdev(F) microcode(F) snd(F) serio_raw(F) i2c_algo_bit(F) soundcore(F) mac_hid(F) snd_page_alloc(F) lpc_ich(F) video
) hid(F) usb_storage(F) firewire_ohci(F) firewire_core(F) crc_itu_t(F) ahci(F) libahci(F) r8169(F)
[ 764.575407] CPU 0
[ 764.575422] Pid: 0, comm: swapper/0 Tainted: GF            3.8.0-29-generic #42~precise1-Ubuntu HP-Pavilion FJ463AA-ABA a6528p/Benicia
[ 764.575474] RIP: 0010:[<ffffffff8135b990>]  [<ffffffff8135b990>] timerqueue_add+0x20/0xb0
[ 764.575516] RSP: 0018:ffffffff81c01d08  EFLAGS: 00010086
[ 764.575541] RAX: 0000000000000000 RBX: ffff880056555a10 RCX: 000000b213debb39
[ 764.575572] RDX: ffff880056555a08 RSI: ffff8800bf40ea60 RDI: ffff8800bf40e850
[ 764.575601] RBP: ffffffff81c01d28 R08: ffff8800bf40e900 R09: 0000000000000000
[ 764.575631] R10: 0000000000000004 R11: 0000000000000000 R12: ffff8800bf40ea60
[ 764.575661] R13: ffff8800bf40e850 R14: 0000000000000000 R15: 0000000000000000
[ 764.575692] FS:  0000000000000000(0000) GS:ffff8800bf400000(0000) knlGS:0000000000000000
[ 764.575727] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 764.575752] CR2: 00007fedd22ed2ff CR3: 00000000b65ec000 CR4: 00000000000007f0
[ 764.575782] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0 000000000000000
[ 764.575812] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 764.575842] Process swapper/0 (pid: 0, threadinfo ffffffff81c00000, task ffffffff81c15440)
[ 764.575878] Stack:
[ 764.575889]  ffffffff81c01d18 ffff8800bf40ea60 ffff8800bf40e840 ffff8800bf40ea60
[ 764.575932]  ffffffff81c01d68 ffffffff810831a9 ffffffff81c01d68 ffff8800bf40e840
[ 764.575975]  ffff8800bf40e840 ffff8800bf40ea60 0000000000000000 0000000000000000
[ 764.576017] Call Trace:
[ 764.576034]  [<ffffffff810831a9>] enqueue_hrtimer+0x39/0x80
[ 764.576059]  [<ffffffff81083dcc>] __hrtimer_start_range_ns+0x13c/0x360
[ 764.576092]  [<ffffffff8106bef5>] ? get_next_timer_interrupt+0xc5/0x140
[ 764.576121]  [<ffffffff81084008>] hrtimer_start+0x18/0x20
[ 764.576146]  [<ffffffff810b6ac0>] tick_nohz_stop_sched_tick+0x200/0x2f0
[ 764.576176]  [<ffffffff810b6dfa>] __tick_nohz_idle_enter+0x8a/0xc0
[ 764.576205]  [<ffffffff810b720d>] tick_nohz_idle_enter+0x3d/0x70
[ 764.576234]  [<ffffffff8101da70>] cpu_idle+0x70/0x120
[ 764.576260]  [<ffffffff816c6db2>] rest_init+0x72/0x80
[ 764.576286]  [<ffffffff81d05c4f>] start_kernel+0x3d1/0x3de
[ 764.576312]  [<ffffffff81d057ff>] ? pass_bootoption.constprop.2+0xd3/0xd3
[ 764.576343]  [<ffffffff81d05397>] x86_64_start_reservations+0x131/0x135
[ 764.576372]  [<ffffffff81d05120>] ? early_idt_handlers+0x120/0x120
[ 764.576401]  [<ffffffff81d05468>] x86_64_start_kernel+0xcd/0xdc
[ 764.576426] Code: 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 55 49 89 fd 41 54 49 89 f4 53 48 89 fb 48 83 ec 08 48 3b 36 75 6c 31 d2 eb 19 90 <48> 8b 48 18 49 3
10 48 0f 4d da
[ 764.576718] RIP  [<ffffffff8135b990>] timerqueue_add+0x20/0xb0
[ 764.575932]  ffffffff81c01d68 ffffffff810831a9 ffffffff81c01d68 ffff8800bf40e840
[ 764.575975]  ffff8800bf40e840 ffff8800bf40ea60 0000000000000000 0000000000000000
[ 764.576017] Call Trace:
[ 764.576034]  [<ffffffff810831a9>] enqueue_hrtimer+0x39/0x80
[ 764.576059]  [<ffffffff81083dcc>] __hrtimer_start_range_ns+0x13c/0x360
[ 764.576092]  [<ffffffff8106bef5>] ? get_next_timer_interrupt+0xc5/0x140
[ 764.576121]  [<ffffffff81084008>] hrtimer_start+0x18/0x20
[ 764.576146]  [<ffffffff810b6ac0>] tick_nohz_stop_sched_tick+0x200/0x2f0
[ 764.576176]  [<ffffffff810b6dfa>] __tick_nohz_idle_enter+0x8a/0xc0
[ 764.576205]  [<ffffffff810b720d>] tick_nohz_idle_enter+0x3d/0x70
[ 764.576234]  [<ffffffff8101da70>] cpu_idle+0x70/0x120
[ 764.576260]  [<ffffffff816c6db2>] rest_init+0x72/0x80
[ 764.576286]  [<ffffffff81d05c4f>] start_kernel+0x3d1/0x3de
[ 764.576312]  [<ffffffff81d057ff>] ? pass_bootoption.constprop.2+0xd3/0xd3
[ 764.576343]  [<ffffffff81d05397>] x86_64_start_reservations+0x131/0x135
[ 764.576372]  [<ffffffff81d05120>] ? early_idt_handlers+0x120/0x120
[ 764.576401]  [<ffffffff81d05468>] x86_64_start_kernel+0xcd/0xdc
[ 764.576426] Code: 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 55 49 89 fd 41 54 49 89 f4 53 48 89 fb 48 83 ec 08 48 3b 36 75 6c 31
3 of 4 da
[ 764.576718] RIP  [<ffffffff8135b990>] timerqueue_add+0x20/0xb0
[ 764.576750]  RSP <ffffffff81c01d08>
[ 764.578438] ---[ end trace abf4eeb416dad9a7 ]---
[ 764.588793] general protection fault: 0000 [#2] SMP
[ 764.588793] Modules linked in: bnep(F) rfcomm(F) bluetooth(F) snd_hda_codec_realtek(F) snd_hda_intel(F) snd_hda_codec(F) uvcvideo(F) snd_u
snd_usbmidi_lib(F) coretemp(F) videodev(F) snd_seq_midi(F) videobuf2_vmalloc(F) snd_seq_midi_event(F) videobuf2_memops(F) snd_seq(F) drm_k
[ 764.588793] Kernel panic - not syncing: Attempted to kill the idle task!
[ 764.588793] Shutting down cpus with NMI
[ 764.588793] drm_kms_helper: panic occurred, switching back to text console

I'm attempting to install Ubuntu 14.04 alongside Windows 8.1. I had Ubuntu 12.04 installed with Windows 8.1 before, but it became corrupted so I decided to do a complete uninstall/reinstall with 14.04.

I'm booting from a USB stick that contains 14.04. It boots successfully to the USB stick, and I'm able to get to the installation screen for Ubuntu. I click on "Install Ubuntu", and connect to the Internet successfully. I meet all the requirements by the installer (enough hard drive space to install, connected to the internet, laptop is plugged in), so I click next to start installing. I select "Install Ubuntu alongside Windows", and click next. Then my laptop reboots and boots into Windows 8.1. There is no evidence that Ubuntu was installed.

I've tried it multiple times and every time it reboots at that step and automatically goes to Windows. I've also tried to quickly enter the boot order menu when it does reboot and boot again from my USB stick (also does not work). I don't have a blank CD at hand to make a boot CD/DVD, so I have to try and make my USB stick work.

Has anybody else experienced this problem? Any ideas on a solution?

I'm having problems installing Ubuntu 12.04 LTS 64-bit on my laptop.

I once had it installed on my laptop with Windows 7 and Ubuntu 12.04 64-bit, but LightDM got weird so I was forced to erase the Ubuntu partition.

I erased all swap partition and ext4 partition. After that, I used MiniTool Partition Wizard to rebuild the MBR, so there was only Windows 7 left.

After that I tried a VM, but I was very disappointed. I tried installing Ubuntu on my laptop again, but the installer did not recognize my Windows partition. It just showed one HDD with no partitions, just one blank 320 GB drive.

I went back to Windows, did some searching and I messed up my MBR. I used gdisk to wipe MBR along with the HDD signature.

I couldn't use any partition, and my laptop didn't boot into anything.

I got Windows 7 install cd and ran recovery. It was fixed in 5 seconds.

Then I tried installing Ubuntu again with my CD, but a kernel panic occurred:

[    5.103671] Kernel panic - not syncing: VFS: Unable to mount root fs on  
unknown-block(0,0)
[    5.103706] Pid: 1, comm: swapper/0 Not tainted 3.2.0-29-generic #46-Ubuntu
[    5.103735] Call Trace:
[    5.103762]  [<ffffffff81640ec8>] panic+0x91/0x1a4
[    5.103791]  [<ffffffff81cfc01e>] mount_block_root+0xdc/0x18e
[    5.103821]  [<ffffffff81002930>] ? populate_rootfs_wait+0x300/0x9d0
[    5.103851]  [<ffffffff81cfc257>] mount_root+0x54/0x59
[    5.103878]  [<ffffffff81cfc3c9>] prepare_namespace+0x16d/0x1a6
[    5.103907]  [<ffffffff81cfbd63>] kernel_init+0x153/0x158
[    5.103936]  [<ffffffff81664034>] kernel_thread_helper+0x4/0x10
[    5.103965]  [<ffffffff81cfbc10>] ? start_kernel+0x3bd/0x3bd
[    5.103993]  [<ffffffff81664030>] ? gs_change+0x13/0x13
_

I tried installing through wubi.exe, but after it was booted, it said it couldn't find root and get root or mount root, and fix partition.

How do I successfully install Ubuntu 12.04 LTS 64-bit on my laptop?