My PC has no audio. I use Kubuntu 24.04 and KDE Plasma 5.27.12. I know nothing about computers. My monitor is a HQ 19.5". Apparently it has no audio output, but the audio also doesn't work if I try and connect earphones. I get audio only when I connect my CPU to the TV in the living room. Should I buy a new monitor?

Specifications:

   OS: Kubuntu 24.04
   KDE Plasma Version: 5.27.12
   KDE Frameworks Version: 5.115.0
   Qt version: 5.15.13
   Kernel version: 6.17.0-35-generic (64-bit)
   Graphics platform: X11
   Processors: 4 × AMD Ryzen 3 2200G with Radeon Vega Graphics
   Memory: 5.7 GiB of RAM
   Graphics processor: AMD Radeon Vega 8 Graphics

The audio system shows 2 outputs (HDMI and Pro Audio) which I can select with or without earphones connected, and I tested both with the earphones connected and there was no audio. I connected the earphones through the top and back connectors, and I tested with both outputs listed above. In the past I also tried connecting speakers to it, but it still had no audio.

I use Inkscape to run a vinyl cutter. Every time I try to use the cutter I have to change permissions using:

sudo chmod a+rw /dev/ttyUSB0

I believe there should be a way to set up permissions, possibly using groups, so that the permission is remembered and does not have to be changed every session. However, the information I have been able to find online seems to me to contradictory and confusing. I am wary of making changes without clear instructions as I am concerned about breaking other permissions.

When I run lsusb the entry for the cutter is:

Bus 001 Device 007: ID 0403:6001 Future Technology Devices International, Ltd FT232 Serial (UART) IC

I am using Ubuntu 24.04. I am the only user.

Is anyone able to help me with simple step by step instructions please? Any help is much appreciated, but needs to be simple as use Ubuntu as a means to an end.

For a couple weeks now, I've been experiencing random reboots on my laptop.

They happen once or twice a day or not at all, either while in use (black screen), from suspend, or at boot (-> GRUB-menu). All I do at the laptop is write texts and ocassionally game.

From my logs, these "Previous system reset reason" messages jump out at me:

• internal CPU shutdown event occured - Coincides with reboot times, except at boot.
• software wrote 0x6 to reset control register 0xCF9 - Too many, but a few coincide with at boot.
• ACPI power state transition occurred - Rare, possibly unrelated.

See sample logs HERE and HERE. (Some things are redacted.) Also, see my CPU information HERE.

Architecture:                x86_64
  CPU op-mode(s):            32-bit, 64-bit
  Address sizes:             44 bits physical, 48 bits virtual
  Byte Order:                Little Endian
CPU(s):                      8
  On-line CPU(s) list:       0-7
Vendor ID:                   AuthenticAMD
  Model name:                AMD Ryzen 3 7320U with Radeon Graphics
    CPU family:              23
    Model:                   160
    Thread(s) per core:      2
    Core(s) per socket:      4
    Socket(s):               1
    Stepping:                0
    Frequency boost:         enabled
    CPU(s) scaling MHz:      37%
    CPU max MHz:             4151.7300
    CPU min MHz:             425.1780
    BogoMIPS:                4791.29
    Flags:                   fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pg
                             e mca cmov pat pse36 clflush mmx fxsr sse sse2 ht s
                             yscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constan
                             t_tsc rep_good nopl xtopology nonstop_tsc cpuid ext
                             d_apicid aperfmperf rapl pni pclmulqdq monitor ssse
                             3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xs
                             ave avx f16c rdrand lahf_lm cmp_legacy svm extapic 
                             cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw
                              ibs skinit wdt tce topoext perfctr_core perfctr_nb
                              bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_psta
                             te ssbd mba ibrs ibpb stibp vmmcall fsgsbase bmi1 a
                             vx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt 
                             clwb sha_ni xsaveopt xsavec xgetbv1 cqm_llc cqm_occ
                             up_llc cqm_mbm_total cqm_mbm_local clzero irperf xs
                             aveerptr rdpru wbnoinvd cppc arat npt lbrv svm_lock
                              nrip_save tsc_scale vmcb_clean flushbyasid decodea
                             ssists pausefilter pfthreshold avic v_vmsave_vmload
                              vgif v_spec_ctrl umip rdpid overflow_recov succor 
                             smca sev sev_es
Virtualization features:     
  Virtualization:            AMD-V
Caches (sum of all):         
  L1d:                       128 KiB (4 instances)
  L1i:                       128 KiB (4 instances)
  L2:                        2 MiB (4 instances)
  L3:                        4 MiB (1 instance)
NUMA:                        
  NUMA node(s):              1
  NUMA node0 CPU(s):         0-7
Vulnerabilities:             
  Gather data sampling:      Not affected
  Ghostwrite:                Not affected
  Indirect target selection: Not affected
  Itlb multihit:             Not affected
  L1tf:                      Not affected
  Mds:                       Not affected
  Meltdown:                  Not affected
  Mmio stale data:           Not affected
  Old microcode:             Not affected
  Reg file data sampling:    Not affected
  Retbleed:                  Mitigation; untrained return thunk; SMT enabled wit
                             h STIBP protection
  Spec rstack overflow:      Mitigation; Safe RET
  Spec store bypass:         Mitigation; Speculative Store Bypass disabled via p
                             rctl
  Spectre v1:                Mitigation; usercopy/swapgs barriers and __user poi
                             nter sanitization
  Spectre v2:                Mitigation; Retpolines; IBPB conditional; STIBP alw
                             ays-on; RSB filling; PBRSB-eIBRS Not affected; BHI 
                             Not affected
  Srbds:                     Not affected
  Tsa:                       Not affected
  Tsx async abort:           Not affected
  Vmscape:                   Mitigation; IBPB before exit to userspace

Since upgrading to Ubuntu 26.04, I've had Linux kernel panics at boot once in a blue moon. Could this be relevant?

The only software I've installed within these last few weeks are VSCodium and .NET SDK.

For VSCodium:

1. snap install codium --classic
2. "Getting all telemetry out"
3. Installed muhammadsammy's C# plugin through VSCodium
4. Installed .NET SDK (see later)
5. Uninstall everything (wasn't happy)
   • Including sudo rm /usr/local/bin/dotnet (again, see later)

For .NET SDK:

1. sudo snap install dotnet-sdk --classic (or dotnet-sdk-100 when installing VSCodium)
2. sudo ln -s /snap/dotnet-sdk/current/dotnet /usr/local/bin/dotnet (for dot-net-100)
3. Added to ~.profile:
   • export DOTNET_CLI_TELEMETRY_OPTOUT=true
   • export DOTNET_ROOT=/snap/dotnet-sdk/current

What I've tried:

• Disabling Fast Boot, makes no difference?
• Running MyAsus System Diagnostics, all OK
• Keeping tabs on systemctl timers, not correlated

What I haven't tried:

• Running memtest
• Fresh reinstall
• Changing other BIOS/UEFI settings

Update 1: BIOS update

As suggested by ChanganAuto, I updated the BIOS. I followed the instructions from both "BIOS Update" and my laptop vendor's:

1. Back up my stuff plus /boot/efi/EFI
2. Download the official BIOS file (flash) for my device
3. Unzip the file, then move its content to /boot/efi/EFI
4. Use ASUS Firmware Update from ASUS in UEFI on the file

Will update if the issue still persists.

I am having problem to install ubuntu as its freezing at the stage copying files. I have the new laptop asus rog g16 with amd ryzen9. I ahve tried all the possible steps and set up the settings suitable too. Please help me.

I'm trying to install Ubuntu 26.04 LTS to an external SanDisk 4 TB SSD drive from a usb stick.

I get the "Something went wrong" screen. This happens with two different computers.

When I click the "Show Log" button, the only message that is displayed is "No journal files were found."

This is very reproducible.

Out of curiosity, is there a way to download the new Yaru theme from somewhere (specifically the new revised Yaru theme in 26.04 LTS)? I was interested in using it in Kubuntu since I prefer that over GNOME but I wasn't sure where I could find all the folders and stuff like that to make an icon pack. I am not planning on publishing it or anything, just want to have it for my personal use.

On ubuntu 22.04 installed postgresql-17. Checking if installed like: dpkg -l | grep postgresql-17

and result is:

ii  postgresql-17   17.10-1.pgdg22.04+1   amd64    The World's Most Advanced Open Source Relational Database

Means version 17 is installed right? But how Can I start server? trying: sudo systemctl start postgresql@17-main

Gives: "Assertion failed on job for postgresql@17-main.service."

I wanted to install zsh on my terminal to customise it. But after running this command: chsh -s $(which zsh). I have encountered an error message or a pop-up window that looks like this:

Any solutions for this?

I have RAID6 disks running well on a old server running Ubuntu 12 with an old mdadm v3.2.5. That RAID is built directly on the disk, not into a partition.

I moved my 5 disks to my new server, with fresh install of Ubuntu 26.

When I boot my new server, the RAID is not created, and a partition is created on the 5 disks! I can not understand how Ubuntu can write to the disks without asking!

If a bring back the disk to my old server, it will not be created, but I can recreate it with the command

mdadm --create /dev/md125 --assume-clean --level=6 --raid-devices=5 /dev/sde /dev/sdd /dev/sdf /dev/sdc /dev/sdb

How can I prevent my new Ubuntu 26 from creating a partition on the 5 RAID disks. I just want UBUNTU to do nothing with them during boot. Than I could use mdadm to assemble, or create the RAID6.

I have played with grub to set to skip option to fsck, and it did not solve my problem. Something else is creating those partitions.

Here is what is created on my 5 RAID6 disks by something

sdb                         8:16   0   2.7T  0 disk
└─sdb1                      8:17   0    16M  0 part
sdc                         8:32   0   2.7T  0 disk
└─sdc1                      8:33   0    16M  0 part
sdd                         8:48   0   2.7T  0 disk
└─sdd1                      8:49   0    16M  0 part
sde                         8:64   0   2.7T  0 disk
└─sde1                      8:65   0    16M  0 part
sdf                         8:80   0   2.7T  0 disk
└─sdf1                      8:81   0    16M  0 part

On Ubuntu Unity 26.04, the touchpad moves, however it does not click or right-click. The touchpad model is "ETPS/2 Elantech Touchpad", and the laptop is a Lenovo 100e gen 1. It is using the synaptic driver, and switching to libinput has no effect. Libinput list-devices reports 'click method: none' for the touchpad. I have tried unloading and reloading the psmouse kernel module, however that only led to it left-clicking once then holding regardless of input. The issue also effects my external USB mouse.

How I got there: I don't have a precise idea, I think it is a problem with updates. First I had problem with Alsa mixer. My sound didnt work when I wanted to watch a video. Each time I needed to reload alsa for the computer to emit sound. After I have some updates to do, the computer would shut down and I had to turn it back on, but no update was installed and it asked again every time I turned on the PC. This must have been going on for about two months. 5days ago it shut down and I can no longer exit the console screen when I turn on the PC. I can log in.

I'm a noob on Ubuntu, I don't understand and know a lot and how it works so I searched but found nothing to help me.

I want to return to the graphic screen, I think my data is dead but I would prefer to keep it if possible.

I am currently stuck on the console or tty screen. So I tried many commands to exit:

• CTRL + ALT + Fx

  (where x is between 1 to 12) it should work but no, I just change of screen but I don't quit.

• startx

  but that just gave an error:

Oh shoot ! Something went wrong. A problem has occurred and the system cannot recover. Log out and try again.

It doesn't work. Then:

X.Org X Server 1.21.1.11 
X Protocol Version 11, Revision 0
Current Operating System: Linux \[*PC characteristics, huge numbers and hour*\]
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.17.0-23-generic root=UUID=8badbb6b-ce79-499b-adc6-9c18032b1f7 ro quiet splash vt.handoff=7
xorg-server 2.21.1.12-1ubuntu1.5 (For tecjnical support please see https://www.ubuntu.com/support) 
Current version of pixman: 0.42.2
Markers: (--) probeb, (\*\*) from config files, (II) informational, (WW) warning, (==) default setting, *this is an explanation for what follows, I don't wrote everything.*
(==) Log files: "/home/scrat/.local/share/worg/Xorg.0.log", Time: Fri Jun 26 00:55:06 2026
(==) Using system co.fig directory "/usr/share/X11/xorg.conf.d"
waiting for X server to shut down (II) Server terminated successfully (0). Closing log.file.Errors from xkbcomp are not fatal to the X serverxinit: connection to X server

I didn't find their contact. I have an Ubuntu account.

• CTRL + ALT + FN + F3

  there is just a black screen now. I shut down with the button and it says

[       73.838956] snd_soc_avs 0000:00:0e.0: invalid firmware data:    -22

[       73.838970] snd_soc_avs 0000:00:0e.0: firmware boot failed: -22

[       73.838975] snd_soc_avs 0000:00:0e.0: PM: dpm_run_callback(): pci_pm_resume returns -22

[       73.838990] snd_soc_avs 0000:00:0e.0: PM: failed to resume: error -22

[       73.890626] ish-hid {33AECD58-B679-4E54-9BD9-AO4D34FORD34FOC226}: wait for resume timed out

Thank you

My laptop is new hp Omnibook 3. I just installed Ubuntu 26.04 and noticed that after sleep mode, it cannot see any wifi networks at all. I have to reboot the laptop to be able to connect again.

I have tried to disable wifi.powersave using this post without luck.

I have a Kubuntu server with two SFP+ ports and two 2.5Gbps Ethernet ports.

One of the 10Gbps SFP+ port is connected to a the 10Gbps SFP+ port on the switch using a CAT6 cable. Length 1.5m

I had no problems with it until it was getting hotter.

The connection stuttered and when I pinged from the server to the router, the ping stuttered also.

I noticed the SFP+ modules were really hot and I disconnected them and fall back on the 2.5Gbps Ethernet port.

I searched the internet and SFP+ copper, seems to get really hot.

Then I asked the seller and he proposed some tiny cooling ribs on the SFP+ modules.

Personally, I do not think that’s an adequate solution and definitely, not in a business situation.

• Is there anybody out there who has experienced anything similar and found a decent solution?

• Would it be possible to configure the 2.5Gbps as a fallback port when the SFP+ modules aren’t connected?

  Of course, server IP must remain the same.

• Or is there another solution which I didn’t think of?

My NAS is a AOOSTAR WTR MAX 8845 (aoostar.com/products/…) with two embedded SFP+ ports. The SFP+ modules are HORACO 10Gb SFP+ Module 1.25/2.5/5/10G SFP+ to RJ45 Transceiver on both sides. The switch is also Horaco 8 port 2.5Gbps and 1x 10Gbps SFP+ port. I've found some small heatsinks which I put on the SFP modules and next week, I'll connect them again and will test them. Is there a simple tool or docker to check stability and functionality of the SFP+ modules?

After I've upgraded from Ubuntu 24.04 to 26.04, the ls -l command behaves strangely.

I have a folder that is sync'ed with Dropbox, and files in that folder automatically get the extra attribute user.com.dropbox.attrs.

When I do a "ls -l" in a Dropbox folder, the output is something like this:

-rw-r--r--+                            1 user group      574 Nov 24  2008 z.txt

with a lot of extra spaces after the '+', which indicates that additional attributes are present.

Strangely, the number of extra spaces depends on the number of files in the listing.

This is quite annoying. Why does ls behave in this way, and how do I avoid it?

EDIT

As requested, here is a complete output from a directory using ls -l:

total 0
-rw-rw-r--+         1 user group 0 May 27 10:44 q1
-rw-rw-r--+         1 user group 0 May 27 10:44 q2
-rw-rw-r--+         1 user group 0 May 27 10:44 q3
-rw-rw-r--+         1 user group 0 May 27 10:44 q4
-rw-rw-r--+         1 user group 0 May 27 10:44 q5
-rw-rw-r--+         1 user group 0 May 27 10:44 q6
-rw-rw-r--+         1 user group 0 May 27 10:44 q7
-rw-rw-r--+         1 user group 0 May 27 10:44 q8
-rw-rw-r--+         1 user group 0 May 27 10:44 q9

And the same directory listed with gnuls -l:

total 0
-rw-rw-r-- 1 user group 0 May 27 10:44 q1
-rw-rw-r-- 1 user group 0 May 27 10:44 q2
-rw-rw-r-- 1 user group 0 May 27 10:44 q3
-rw-rw-r-- 1 user group 0 May 27 10:44 q4
-rw-rw-r-- 1 user group 0 May 27 10:44 q5
-rw-rw-r-- 1 user group 0 May 27 10:44 q6
-rw-rw-r-- 1 user group 0 May 27 10:44 q7
-rw-rw-r-- 1 user group 0 May 27 10:44 q8
-rw-rw-r-- 1 user group 0 May 27 10:44 q9

Furthermore, if I do a ls -l q[1234], I get this:

-rw-rw-r--+    1 user group 0 May 27 10:44 q1
-rw-rw-r--+    1 user group 0 May 27 10:44 q2
-rw-rw-r--+    1 user group 0 May 27 10:44 q3
-rw-rw-r--+    1 user group 0 May 27 10:44 q4

Note that the number of spaces is smaller when the number of listed files is smaller.

(user and group have been replaced for privacy.)

I can't get horizontal scroll of Logitech MX Master 3 to work via Remmina. Scrolling works in the host Ubuntu, but nothing happens via Remmina in Windows 11. It's like the events won't even be sent to Windows.

How to fix this?

I'm on Ubuntu 24.04 LTS. The Windows 11 is running locally as qemu guest, and I have Remmina 1.4.35. And yes, I also have Solaar here in Ubuntu.

I'm trying to replace Windows with Ubuntu 24.04. Currently I use dual boot. I'm experiencing very slow internet speed on Ubuntu compared to Windows 11.

Output of lshw :

*-network
                description: Wireless interface
                product: QCA9377 802.11ac Wireless Network Adapter
                vendor: Qualcomm Atheros
                physical id: 0
                bus info: pci@0000:02:00.0
                logical name: wlp2s0
                version: 31
                serial: d0:c5:d3:2f:6d:13
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=ath10k_pci driverversion=6.8.0-49-Wgeneric firmware=WLAN.TF.2.1-00021-QCARMSWP-1 ip=192.168.1.198 latency=0 link=yes multicast=yes wireless=IEEE 802.11
                resources: irq:135 memory:ef200000-ef3fffff

The Snap Store never stops 'loading updates' so I can't update through the Snap Store.

I know that's not the only way to update apps, but the Snap Store seems like something that should work without issue on Ubuntu, right? I'd like to learn what might be wrong and what I can do to fix it.

The longer story:

I upgraded to 24.04.1 the other day. This was my first time upgrading Ubuntu (I'm still a very green user). It was a mostly smooth process. It locked up a couple of times; I restarted the PC a couple of times. Once it finally got going, it said a partial upgrade was suggested due to some third party app obstruction (most likely Fade In). From there on out, though, things ran just fine.

As far as I can tell, there are only two issues with the new install. The first is Ghost Writer (the full screen mode doesn't work. Not a big loss. I reported the bug. We'll see if it gets fixed.) The second is the Snap Store which, even after being left to load updates for 30 minutes, just keeps loading.

Per amar's suggestion, I ran: killall snap-store, as well as: sudo snap update, which returned the following: error: unknown command "update", see 'snap help'.

As some probably know, 'snap help' returned a list of commands, not any helpful info.

Then I ran sudo apt install -f which returned 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded

sudo snap refresh returned: all snaps are up to date

Per user535733's suggestion, I 'Quit' Ubuntu Software using: snap-store --quit then ran snap-store and received the following output:

sw@Bilbo:~$ snap-store --quit
16:30:38:0957 Gtk Not loading module "atk-bridge": The functionality is provided by GTK natively. Please try to not load it.
sw@Bilbo:~$ snap-store
16:31:00:0210 Gtk Not loading module "atk-bridge": The functionality is provided by GTK natively. Please try to not load it.
Graylist: app;application;package;program;programme;suite;tool
16:31:00:0523 PK  unhandled property 'Sender'
16:31:00:0561 Gs  lost session service
16:31:00:0561 Fwupd fwupd_client_download_bytes_async: assertion 'url != NULL' failed
16:31:00:0561 Fwupd fwupd_client_download_bytes_async: assertion 'url != NULL' failed
16:31:01:0451 Gs  Only 0 apps for recent list, hiding
16:31:02:0346 PK  unhandled property 'Sender'
16:31:03:0107 PK  unhandled property 'Sender'
16:31:03:0297 PK  unhandled property 'Sender'

The logs for that time read:

10:34:16 AM kernel: logitech-djreceiver 0003:046D:C537.0004: Unexpected input report number 128
 9:22:18 AM systemd: Failed to start app-gnome-user\x2ddirs\x2dupdate\x2dgtk-3089.scope - Application launched by gnome-session-binary.
 9:22:16 AM gdm-session-wor: gkr-pam: unable to locate daemon control file
 9:22:09 AM (uetoothd): sap-server: Operation not permitted (1)

Please let me know if I've messed up your suggestions, as well as what you think might be wrong and/or what more I can do to troubleshoot this.

Amar: I opened it manually.

user535733|:

$ snap list snap-store
Name        Version           Rev   Tracking         Publisher   Notes
snap-store  41.3-77-g7dc86c8  1113  latest/stable/…  canonical✓  

Snap Store loading:

Trying to follow this tutorial, but there no such activities menu

How to install an additional keyboard language on Ubuntu 22.04?

You use gnome tweaks to turn on hover to focus. But then you can not also use keyboard shortcuts to change between windows AND type in the other windows. You have to then use the mouse to hover over the window you changed to using the keyboard.

Ubuntu 20.04, Libre Office 6.4.7.2

Ubuntu 22.04, Libre Office 7.3.3.2

Kubuntu 24.04, Libre Office 24.2.7.2

Libre Office Calc : With ctrl-f I will get the "search Box", type in something for search a.s.o.. Next string to search a.s.o.. In former Versions of Libre Office, there were always a "search string history" present (arrow down next to the box), but now the pull down box is always empty.

Is there any configuration possible to get the "search string history" as in former SW versions ?

Perhaps I have found a reason but not a way to turn off.

Is it possible to make it independent : The LibreOffice calc "search Box" and the linux clipboard ?

On a Ubuntu Server LTS 20.x, with renderer : networkd, LAN / WAN Connectivity are all properly fucntional. However in Cockpit > Software Updates, it gives the error message:

Loading available updates failed    
Cannot refresh cache whilst offline    

Changing the setting to renderer : NetworkManager
makes Cockpit > Software Updates work flawlessly without impacting the Networking module in Cockpit.

But I would rather stick to renderer : networkd as this is a Server.

Any insight to get renderer : networkd to work ? Or Cockpit just 'needs' NetworkManager ?

Note:

sudo systemctl stop network-manager.service    
sudo systemctl disable network-manager.service     

Will make the Networking module in cockpit fail with error :

Network devices and graphs require NetworkManager

The file manager that came with my installation ("Simple file manager for Gnome") doesn't show thumbnails for jpg, png, and videos. I've gone to /Preferences/Search & Preview and made sure it's set to always show thumbnails but it doesn't. How can I fix this?

I am trying to revive an old Lenovo Ideapad Z360 laptop using Ubuntu 20.04 LTS. This laptop has an integrated Intel GPU and a discrete Nvidia GPU, as follows:

$ lspci -k | grep -EA3 'VGA|3D|Display'
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
    Subsystem: Lenovo Core Processor Integrated Graphics Controller
    Kernel driver in use: i915
    Kernel modules: i915
--
01:00.0 VGA compatible controller: NVIDIA Corporation GT218M [GeForce 310M] (rev a2)
    Subsystem: Lenovo GT218M [GeForce 310M]
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia

On Ubuntu Mate 20.04, I am able to switch from the Nvidia GPU to the Intel GPU just fine. I can do this using the panel icon (mate-optimus); or using the terminal (prime-select); or using the Nvidia application (nvidia-settings). They all work, and the desktop loads just fine after I logout and login back again. The "on demand" option doesn't work --- mate-optimus' github states that "NVIDIA On-Demand (known as PRIME Render Offload) will require the NVIDIA 435 drivers", so I guess this excludes my GPU (which uses NVIDIA 340 drivers) ---, but I am ok with that. I am happy being able to switch between the Intel and Nvidia GPUs when needed. On Ubuntu Mate 20.04, this works just fine.

However, on Ubuntu 20.04 (Gnome), switching to the Intel GPU doesn't work!!

First thing I noticed is that the "PRIME Profiles" menu section was not available in the Nvidia application (nvidia-settings). I was able to fix that by installing the nvidia-prime package (which came pre-installed in Ubuntu Mate, but not in Ubuntu Gnome).

However, when I try to switch to the Intel GPU, I am not able to log back into the desktop after I logout (it loops back to the gdm3 greeter). If I reboot when the Intel GPU is selected, than I get a black screen. In order to fix that, I have to either switch back to the Nvidia GPU (using prime-select), or remove all nvidia packages (and use the nouveau driver instead).

So my question is: Why does it work on Ubuntu Mate, but not on Ubuntu Gnome?

I want to install a vnc-server on a Ubuntu 18.04 desktop (clean install). I've tried vino, tigervnc, tightvnc. For vino, I don't get the screensharing option in the settings. For tigervnc and tightvnc the installation proceeds, I create the configuration, but when I try to connect I get a grey screen with a cross cursor.

I've tried a VM (clean installation) with Ubuntu 19.04 desktop and vino-server, turned screen sharing on. When I tried to connect with Remmina from the host, I get a black screen, no cursor.

I'm lost here, have spent hours to get this working, thought this should be a straightforward thing to do.

How can I get screensharing via VNC to work?

SSH is running, UFW disabled.

I'm running Ubuntu 18.04.1 LTS Desktop.

I'm connecting to the desktop via remote SSH session.

I'm trying to get the current resolution for the currently active local session.

I found these seemingly relevant questions:

• How do I find out my screen resolution from a shell script?

• How can I get the monitor resolution using the command line?

• How do I change local display resolution via SSH?

However, xdpyinfo returns the following error:

xdpyinfo:  unable to open display "".

and xrandr returns a similar error:

Can't open display

I'm assuming this is because there is no display connected to my remote SSH session. I've tried switching (su) to the same user as the local session, but the error is the same - I assume for the same reason: no display related to that SSH session.

So, I tried the suggestions from my third link above.

$ export DISPLAY=:0
$ xdpyinfo
No protocol specified
xdpyinfo:  unable to open display ":0"

and

$ xrandr --display :0
No protocol specified
Can't open display :0

How can I poll the display on the active local session for resolution (dimension) info from a remote SSH session?

There is a bash command that comes with installing PyQT Creator called designer that will run a tool called Qt Designer, found under the Qt Creator package. It helps you create GUIs - pretty cool stuff.

There is a problem though... whenever I run designer, I get this error:

designer: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/designer': No such file or directory

And that's great - I don't want it to execute /usr/lib/x86_64-linux-gnu/qt4/bin/designer, I want it to execute /usr/lib/x86_64-linux-gnu/qt5/bin/designer, the difference being between "qt4" (first path) and "qt5" (second path). That's where designer is.

I looked around and found this command type -a (command) and it would tell you where the command definition is "located", if I understand correctly. So I looked it up and got:

$ type -a designer
designer is /usr/bin/designer

But I can't edit that file... it's a bunch of gibberish (side question, what does it mean when a file has no file extension? What does that make it?)

So, my question is, how can I get the command designer to execute /usr/lib/x86_64-linux-gnu/qt5/bin/designer?

Edit: which designer also returns /usr/bin/designer,

also: $ file /usr/bin/designer /usr/bin/designer: symbolic link to qtchooser'

So I also took a look at qtchooser... seems like its a command (not entirely sure what it does).

Here is some output:

file /usr/bin/qtchooser 
/usr/bin/qtchooser: ELF 64-bit LSB  executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=96215e9441b8361f0cc57b37db70fc50752cb05a, stripped

A certain cellphone maker has changed the default format of taking pictures to HEIF (.HEIC, High Efficiency Image File Format), without asking the users (although there is still the option to use jpeg/jpg).

Is there an app/program on Ubuntu that can open and/or convert HEIF-pictures and even let them be edited?

I'm putting together a VPS to host a game server for me and a few friends that is running Ubuntu 16.04 server edition. Right now I'm trying to configure VSFTPD to allow us to upload any files we need to the game directory and this is where I'm running into issues. I created a user named "steam" and installed the steamcmd and game into its home directory (which is all I need access to). I can connect via FTP and log in as "steam" and upload files but when I connect to the server via SSH and log in as "steam" locally my local account doesn't have access to any of the files I've uploaded. Unfortunately this is my first server I've ever tried to configure so I'm having trouble wading through all this. I've tried googling but either the problem doesn't match or it talks about something I don't understand. The closest I've come to a solution is:

Q) Help! Uploaded files are appearing with permissions -rw-------.

A1) Depending on if this is an upload by a local user or an anonymous user, use "local_umask" or "anon_umask" to change this. For example, use "anon_umask=022" to give anonymously uploaded files permissions -rw-r--r--. Note that the "0" before the "22" is important.

A2) Also see the vsftpd.conf.5 man page for the new "file_open_mode" parameter.

but I don't understand what I need to change. There is no VSFTPD.conf.5 anywhere I know. I included my conf file. All I want to do is be able to log into FTP as my local account so me and my friends can upload mission files but I don't want that account to have root access so they can't break the server.

# Example config file /etc/vsftpd.conf
#
# The default compiled in settings are fairly paranoid. This sample file
# loosens things up a bit, to make the ftp daemon more usable.
# Please see vsftpd.conf.5 for all compiled in defaults.
#
# READ THIS: This example file is NOT an exhaustive list of vsftpd options.
# Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's
# capabilities.
#
#
# Run standalone?  vsftpd can run either from an inetd or as a standalone
# daemon started from an initscript.
listen=NO
#
# This directive enables listening on IPv6 sockets. By default, listening
# on the IPv6 "any" address (::) will accept connections from both IPv6
# and IPv4 clients. It is not necessary to listen on *both* IPv4 and IPv6
# sockets. If you want that (perhaps because you want to listen on specific
# addresses) then you must run two copies of vsftpd with two configuration
# files.
listen_ipv6=YES
#
# Allow anonymous FTP? (Disabled by default).
anonymous_enable=NO
#
# Uncomment this to allow local users to log in.
local_enable=YES
#
# Uncomment this to enable any form of FTP write command.
write_enable=YES
#
# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
#local_umask=022
#
# Uncomment this to allow the anonymous FTP user to upload files. This only
# has an effect if the above global write enable is activated. Also, you will
# obviously need to create a directory writable by the FTP user.
#anon_upload_enable=YES
#
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
#anon_mkdir_write_enable=YES
#
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
dirmessage_enable=YES
#
# If enabled, vsftpd will display directory listings with the time
# in  your  local  time  zone.  The default is to display GMT. The
# times returned by the MDTM FTP command are also affected by this
# option.
use_localtime=YES
#
# Activate logging of uploads/downloads.
xferlog_enable=YES
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
connect_from_port_20=YES
#
# If you want, you can arrange for uploaded anonymous files to be owned by
# a different user. Note! Using "root" for uploaded files is not
# recommended!
#chown_uploads=YES
#chown_username=whoever
#
# You may override where the log file goes if you like. The default is shown
# below.
#xferlog_file=/var/log/vsftpd.log
#
# If you want, you can have your log file in standard ftpd xferlog format.
# Note that the default log file location is /var/log/xferlog in this case.
#xferlog_std_format=YES
#
# You may change the default value for timing out an idle session.
#idle_session_timeout=600
#
# You may change the default value for timing out a data connection.
#data_connection_timeout=120
#
# It is recommended that you define on your system a unique user which the
# ftp server can use as a totally isolated and unprivileged user.
#nopriv_user=ftpsecure
#
# Enable this and the server will recognise asynchronous ABOR requests. Not
# recommended for security (the code is non-trivial). Not enabling it,
# however, may confuse older FTP clients.
#async_abor_enable=YES
#
# By default the server will pretend to allow ASCII mode but in fact ignore
# the request. Turn on the below options to have the server actually do ASCII
# mangling on files when in ASCII mode.
# Beware that on some FTP servers, ASCII support allows a denial of service
# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd
# predicted this attack and has always been safe, reporting the size of the
# raw file.
# ASCII mangling is a horrible feature of the protocol.
#ascii_upload_enable=YES
#ascii_download_enable=YES
#
# You may fully customise the login banner string:
#ftpd_banner=Welcome to blah FTP service.
#
# You may specify a file of disallowed anonymous e-mail addresses. Apparently
# useful for combatting certain DoS attacks.
#deny_email_enable=YES
# (default follows)
#banned_email_file=/etc/vsftpd.banned_emails
#
# You may restrict local users to their home directories.  See the FAQ for
# the possible risks in this before using chroot_local_user or
# chroot_list_enable below.
#chroot_local_user=YES
#
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
# (Warning! chroot'ing can be very dangerous. If using chroot, make sure that
# the user does not have write access to the top level directory within the
# chroot)
#chroot_local_user=YES
#chroot_list_enable=YES
# (default follows)
#chroot_list_file=/etc/vsftpd.chroot_list
#
# You may activate the "-R" option to the builtin ls. This is disabled by
# default to avoid remote users being able to cause excessive I/O on large
# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume
# the presence of the "-R" option, so there is a strong case for enabling it.
#ls_recurse_enable=YES
#
# Customization
#
# Some of vsftpd's settings don't fit the filesystem layout by
# default.
#
# This option should be the name of a directory which is empty.  Also, the
# directory should not be writable by the ftp user. This directory is used
# as a secure chroot() jail at times vsftpd does not require filesystem
# access.
secure_chroot_dir=/var/run/vsftpd/empty
#
# This string is the name of the PAM service vsftpd will use.
pam_service_name=vsftpd
#
# This option specifies the location of the RSA certificate to use for SSL
# encrypted connections.
rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
rsa_private_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
ssl_enable=NO

#
# Uncomment this to indicate that vsftpd use a utf8 filesystem.
#utf8_filesystem=YES

I have been dealing with this problem for a couple of days but couldn't find a solution. I've posted on a forum before but nobody answered. Any help?

A couple of days ago a problem started to occur. I can't watch YouTube videos anymore. When I open a video, the animation goes on and on... until the message "an error has occurred". Very very very rarely sometimes a video loads. (Today it never happened, yesterday only once)

Like I said, a couple of days ago it was all working. I didn't do any updates. After this problem, I've installed every update, didn't solve the problem.

It is not browser specific, Google Chrome, Chromium, Firefox, Opera... All have the same problem. It is YouTube specific, I can watch videos on Facebook (not loaded through YouTube) and vimeo and more. I have reinstalled the flash-plugin, didn't solve. (Yet it is not about flash) It is not about my network, using the same network, Windows Laptop, iPhone, Android Tablet all load v

Ubuntu 12.04 LTS 32 Bit

$ uname -a
Linux marvin 3.2.0-45-generic-pae #70-Ubuntu SMP Wed May 29 20:31:05 UTC 2013 i686 i686 i386 GNU/Linux

$ dpkg -l |grep "chrome\|firefox\|opera\|chromium\|flash"
ii adobe-flash-properties-gtk 11.2.202.285-0precise1 GTK+ control panel for Adobe Flash Player plugin version 11
ii adobe-flashplugin 11.2.202.285-0precise1 Adobe Flash Player plugin version 11
ii chromium-browser 25.0.1364.160-0ubuntu0.12.04.1 Chromium browser
ii chromium-browser-l10n 25.0.1364.160-0ubuntu0.12.04.1 chromium-browser language packages
ii chromium-codecs-ffmpeg 25.0.1364.160-0ubuntu0.12.04.1 Free ffmpeg codecs for the Chromium Browser
ii eject 2.1.5+deb1+cvs20081104-9 ejects CDs and operates CD-Changers under Linux
ii firefox 21.0+build2-0ubuntu0.12.04.3 Safe and easy web browser from Mozilla
ii firefox-globalmenu 21.0+build2-0ubuntu0.12.04.3 Safe and easy web browser from Mozilla - Unity menubar integration
ii firefox-gnome-support 21.0+build2-0ubuntu0.12.04.3 Safe and easy web browser from Mozilla - GNOME support
ii firefox-locale-en 21.0+build2-0ubuntu0.12.04.3 English language pack for Firefox
ii google-chrome-stable 27.0.1453.110-r202711 The web browser from Google
ii libcrypt-passwdmd5-perl 1.3-10 interoperable MD5-based crypt() for perl
ii opera 12.15.1748 Fast and secure web browser and Internet suite
ii xserver-xorg-video-openchrome 1:0.2.904+svn1050-1 X.Org X server -- VIA display driver

Any suggestions? Sorry if it is a repost, it's hard to find this problem in the dozens of "restricted-extras not installed" problems...

I'm trying to add subdomains to my home server.

svn.domain.com trac.domain.com

Due to dynamic IP I use dyndns service, on top of that I have domain.com hosted somewhere else. I created CNAME for subdomains on remote host to point to my user.dyndns.org domain.

So now when I visit either of subdomains: trac or svn, I see "It works!" message.

This done, I created two virtual host files under /etc/apache2/sites-enabled

file1: svn.domain.com and file2: trac.domain.com

contents:

<VirtualHost *:80>

  ServerName trac.domain.com

   DocumentRoot = /var/www/trac/repos

   <Directory /var/www/trac/repos>
    Order allow,deny
    allow from all
   </Directory>

</VirtualHost>

And

<VirtualHost *:80>

  ServerName svn.domain.com

   DocumentRoot = /var/svn/repos

   <Directory /var/svn/repos>
    Order allow,deny
    allow from all
   </Directory>

</VirtualHost>

But I get error: ERROR: Site trac.domain.com does not exist!

what am I doing wrong?