I'm trying to change the cursor sensitivity on the login screen, however none of the approaches I could find online seem to work in Ubuntu 26.04.

So far, I've tried using dconf as suggested by some article online (sudo -u gdm dbus-run-session dconf write /org/gnome/desktop/peripherals/mouse/speed -0.8), however this fails and returns...

unable to create directory '/var/lib/gdm3/.cache/dconf': Access denied.  dconf will not work properly.
dbus-daemon[11817]: [session uid=975 pid=11817 pidfd=5] Activating service name='ca.desrt.dconf' requested by ':1.0' (uid=975 pid=11818 comm="dconf write /org/gnome/desktop/peripherals/mouse/s" label="unconfined")
dbus-daemon[11817]: [session uid=975 pid=11817 pidfd=5] Successfully activated service 'ca.desrt.dconf'
error: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._g_2dfile_2derror_2dquark.Code4: Failed to create file “/var/lib/gdm3/.config/dconf/user.CXG7P3”: No such file or directory

Another approach that I could find was using sudo -u gdm dbus-launch gsettings set org.gnome.settings-daemon.plugins.mouse active true, however dbus-launch does not exist in my case.

Can somebody direct me to a method that works on recent versions? I'm quite new to Ubuntu and Linux in general and don't really know my way around. Thank you.

Most windows in Xubuntu include icons at the upper right corner to minimize, maximize and close the window. In XUbuntu 26.04 those icons, although present are not visible. How do I revert then to the traditional look?

Trying to boot an old computer using a live USB and from qemu see:

(screenshot here of qemu showing boot screen)

However, the Ventoy thumb drive just hangs. I don't have another system to check the thumb drive on, unfortunately.

Using:

sudo qemu-system-x86_64   -m 2048   -enable-kvm   -bios /usr/share/OVMF/OVMF_CODE.fd   -drive format=raw,file=/dev/sdb

which seems to work insofar as it shows a boot screen. The boot option does show. However, it just hangs for fifteen plus minutes.

# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 2.6 present.

Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
    Manufacturer: Dell Inc.
    Product Name: 0VNP2H
    Version: A00
    Serial Number: /C0ZZVR1/CN73604183027H/
    Asset Tag: 1000035126
    Features:
        Board is a hosting board
        Board is replaceable
    Location In Chassis: Not Specified
    Chassis Handle: 0x0003
    Type: Motherboard
    Contained Object Handles: 0

I'm just guessing that perhaps it's because the hardware is old:

nicholas@mordor:~$ 
nicholas@mordor:~$ cat /boot/efi/EFI/ubuntu/grub.cfg 
search.fs_uuid 2442-79D7 root hd0,gpt2 
set prefix=($root)'/grub'
configfile $prefix/grub.cfg
nicholas@mordor:~$ 

from lshw:

    description: Desktop Computer
    product: OptiPlex 990
    vendor: Dell Inc.
    version: 01
    serial: C0ZZVR1
    width: 64 bits
    capabilities: smbios-2.6 dmi-2.6 smp vsyscall32
    configuration: administrator_password=disabled boot=normal chassis=desktop frontpanel_password=disabled keyboard_password=disabled power-on_password=disabled uuid=4c4c4544-0030-5a10-805a-c3c04f565231
  *-core

When I launch the Snapshot camera app that I installed via Flatpak, the app opens and shows a frozen image. It doesn't show a real-time image, it shows a frozen image of what the camera sees at the moment it opens.

Device : Lenovo ThinkBook 15 G4 IAP

OS : Ubuntu 24.04.4 LTS

What is the problem? How can I solve the problem? Please help 🙏🏻 Thanks ❤️

I have opened a topic on Snapshot's GitLab page :

https://gitlab.gnome.org/GNOME/snapshot/-/work_items?show=eyJpaWQiOiIzNjMiLCJmdWxsX3BhdGgiOiJHTk9NRS9zbmFwc2hvdCIsImlkIjoyNDA3MjZ9

I am running Ubuntu on an Acer Predator Helios 16 laptop (dual boot setup with Windows).

When I select "Ubuntu" from the GRUB menu, the system always boots into:

Linux 6.17.0-29-generic

Problem:Wifi, Bluetooth, etc are not working.

However, if I manually go to:

Advanced options for Ubuntu → Ubuntu, with Linux 6.17.0-23-generic

then everything works correctly (WiFi, Bluetooth, etc).

I want Ubuntu to boot 6.17.0-23-generic by default, instead of the latest kernel.

What I tried

I edited /etc/default/grub:

GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0

then run

sudo update-grub
sudo grub-set-default "Advanced options for Ubuntu>Ubuntu, with Linux 6.17.0-23-generic"
sudo grub-editenv list

Output confirms:

saved_entry=gnulinux-6.17.0-23-generic-advanced-24bfcac0-c257-44e6-a455-390b94f6815c

However, after reboot the system still boots into:

6.17.0-29-generic

when selecting “Ubuntu” in GRUB.

Question

How can I force GRUB to boot 6.17.0-23-generic by default, instead of always selecting the latest kernel (6.17.0-29-generic) when choosing the main “Ubuntu” entry?

I do NOT want to manually select the kernel every boot

I want a persistent default kernel selection

I am using the instructions on the following site to upgrade from 24.04 to 26.04:

https://help.ubuntu.com/community/QuestingUpgrades/Kubuntu

After typing the last instruction, I get the following error message:

Checking for new Ubuntu release
There is no development version of an LTS available
To upgrade to the latest non-LTS delopment release
Set prompt=normal in etc/update-manager/release-upgrades

I have no intention to install any non-LTS version.

Out of nowhere came this error. The system is not firing up anymore. See below boot messages. Please help (I have files that are not in backup yet...)

BusyBox v1.36.1 (Ubuntu 1:1.36.1-6ubuntu3.1) built-in shell (ash)
Enter 'help' for a list of built-in commands.

## (initramfs) help
Built-in commands:
__________________

    . : [ alias break cd chdir command continue echo eval exec exit
    export false getopts hash help history let local printf pwd read
    readonly return set shift sleep test times trap true type ulimit
    umask unalias unset wait [ [[ acpid arch ascii ash awk base32
    basename blockdev busybox cat chmod chroot chvt clear cmp cp
    crc32 cut date deallocvt deluser devmem df dirname du dumpkmap
    echo egrep env expr false fbset fgrep find fold fstrim grep gunzip
    gzip hostname hwclock i2ctransfer ifconfig ip kill ln loadfont
    loadkmap ls lzop mkdir mkfifo mknod mkswap mktemp modinfo more
    mount mv nuke openvt pidof printf ps pwd readlink reboot reset
    rm rmdir run-init sed seq setkeycodes sh sleep sort stat static-sh
    stty switch_root sync tail tee test touch tr true ts tty umount
    uname uniq wc wget which yes

(initramfs) _

BusyBox v1.36.1 (Ubuntu 1:1.36.1-6ubuntu3.1) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs) exit
Gave up waiting for root file system device.  Common problems:
  - Boot args (cat /proc/cmdline)
    - Check rootdelay= (did the system wait long enough?)
  - Missing modules (cat /proc/modules; ls /dev)
ALERT! UUID=aef43219-ff23-4e11-8680-689aa9ed58c2 does not exist.  Dropping to a shell!

BusyBox v1.36.1 (Ubuntu 1:1.36.1-6ubuntu3.1) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs) _

I was playing in Firefox "forge of empires" when I believe I saw an error note about NVIDIA. I closed all software and did a restart ... to no avail.

@heynnema ls -al /boot screenshot

The computer is booting, all looks fine, but I receive at bootscreen now the error (translated):

forbidden by the secure boot guideline. Loading Linux 6.17.0-23-generic ... Loading initial ramdisk ...

@heynnema this is not easy for me ... I work on your recommendations!

@heynnema nvidia seems to be installed, but there have been error messages, unfortunately in German, which I translated to the best of my capacities:

dpkg: error working at the package nvidia-driver-535 (--configure): dependency problem - it remains not configured
Trigger für libc-bin (2.39-0ubuntu8.7) are worked at ...
errors with: linux-modules-nvidia-535-6.17.0-29-generic
linux-modules-nvidia-535-generic-hwe-24.04
nvidia-driver-535
E: Sub-process /usr/bin/dpkg returned an error code (1)

I don't know how to reboot back to the 29 kernel, because now the "Advanced..." option is missing, when hitting F8 at booting (perhaps because Ubuntu is loading "initial ramdisk"?)

@ maybe here is already something wrong?

$ ubuntu-drivers devices udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
udevadm hwdb is deprecated. Use systemd-hwdb instead.
== /sys/devices/pci0000:00/0000:00:06.0/0000:01:00.0 == modalias : pci:v000010DEd00001C94sv00001025sd0000149Ebc03sc02i00
vendor : NVIDIA Corporation model : GP107M [GeForce MX350] driver : nvidia-driver-535 - distro non-free recommended driver : nvidia-driver-535-server - distro non-free
driver : nvidia-driver-470-server - distro non-free
driver : nvidia-driver-580-server - distro non-free
driver : nvidia-driver-580 - distro non-free
driver : nvidia-driver-470 -distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin

In the topics Can I use the Ubuntu logo on t-shirts produced non-comercially? and Is it possible to create Ubuntu Shirts ( Merchandise ), it has been considered primarily the non-commercial usage of Ubuntu. But what if I want to promote the Ubuntu VPS setup service via the landing page? Can I use the Ubuntu logo in main visual to provide the recognition of the design OS for the landing page visitors? I am imagining something like this:

I know that VPS providers used the logo of the OSs in OS selection interface while it is also the commercial usage of the Ubuntu logo.

I'm using rEFInd as my boot manager and I want to boot Ubuntu 26.04 directly by loading the kernel (vmlinuz), bypassing GRUB entirely and without displaying the GRUB menu. I tried several setup and examples but with no sucess. I don't want to remove grub but just skip it at boot. I need generic rEFInd loader that does not hardcode a kernel version, to always load the latest kernel.

Ubuntu 26.04 on EFI rEFInd installed from repo

$ lsblk -f
nvme0n1                                                                                   
├─nvme0n1p1
│       vfat    FAT32         xxx  181M    40% /boot/efi
├─nvme0n1p2
│       ext4    1.0   ubuntu  xxx  101,6G  18% /

$ ls -alh /boot
total 232M
drwxr-xr-x  4 root root 4.0K May 16 17:23 .
drwxr-xr-x 19 root root 4.0K Apr 29 19:44 ..
-rw-------  1 root root  11M Apr 13 10:12 System.map-7.0.0-14-generic
-rw-------  1 root root  11M Apr 22 16:02 System.map-7.0.0-15-generic
-rw-r--r--  1 root root 302K Apr 13 10:12 config-7.0.0-14-generic
-rw-r--r--  1 root root 302K Apr 22 16:02 config-7.0.0-15-generic
drwxr-xr-x  4 root root 4.0K Jan  1  1970 efi
drwxr-xr-x  5 root root 4.0K May 22 17:24 grub
lrwxrwxrwx  1 root root   27 Apr 29 19:44 initrd.img -> initrd.img-7.0.0-15-generic
-rw-------  1 root root  89M Apr 29 17:59 initrd.img-7.0.0-14-generic
-rw-------  1 root root  89M May 16 17:23 initrd.img-7.0.0-15-generic
lrwxrwxrwx  1 root root   27 Apr 23 02:48 initrd.img.old -> initrd.img-7.0.0-14-generic
-rw-r--r--  1 root root 153K Nov 29 09:22 mt86+ia32
-rw-r--r--  1 root root 158K Nov 29 09:22 mt86+x64
-rw-r--r--  1 root root  252 May  4 16:42 refind_linux.conf
lrwxrwxrwx  1 root root   24 Apr 29 19:44 vmlinuz -> vmlinuz-7.0.0-15-generic
-rw-------  1 root root  17M Apr 27 18:30 vmlinuz-7.0.0-14-generic
-rw-------  1 root root  17M Apr 22 16:05 vmlinuz-7.0.0-15-generic
lrwxrwxrwx  1 root root   24 Apr 23 02:48 vmlinuz.old -> vmlinuz-7.0.0-14-generic

What I've tried, adding in /boot/efi/EFI/refind/refind.conf

menuentry "Ubuntu" {
    volume "UUID of EFI partition"
    loader /vmlinuz
    initrd /initrd
    options "root=UUID="UUID of Ubuntu partition" ro quiet splash"   
}

menuentry "Ubuntu" {
    volume "UUID of EFI partition"
    loader /boot/vmlinuz
    initrd /boot/initrd
    options "root=UUID="UUID of Ubuntu partition" ro quiet splash"   
}

menuentry "Ubuntu" {
    volume "UUID of EFI partition"
    loader /boot/efi/vmlinuz
    initrd /boot/efi/initrd
    options "root=UUID="UUID of Ubuntu partition" ro quiet splash"   
}

There's an app name setting in the app store that's not updating automatically; this has been going on for several days now. Could you please take a look? Thank you!

enter image description here

There's an app in the App Center that can't update automatically.

As I'm going through and updating from 25.10 to 26.04, I have noticed that 'software & updates' has been removed. This is something Canonical has advertised ahead of time.

What I want to know is... if any of the functionality (even in part) has been moved to other software? The ability to download and install security patches daily/immediately and the ability to choose which server to download from seems to be pretty vital stuff.

also the ability to alert me when a new version is available is useful too. I know that it is possible to reinstall the app & Canonical may have felt some of the functionality is too dangerous in uneducated hands, but removing all the functionality seems a little harsh. It means that a proper setup will require installing the app from the terminal just to ensure security.

Edit: After running the update on 3 machines, I checked the notes and 'Software & Updates' is not supposed to be removed for updates, it is only supposed to be missing on new installs. Yet it is being removed on updates as well.

Being new to Linux I've installed Kubuntu 26.04. I'm quite happy with it actually, but when I made the first installation, I made the mistake to not encrypt my SSD first. This is not a problem. It's an occasion to learn how to do that, but I've already installed quite a lot of apps and the issue with it is the amount of settings that all those apps require, without mentioning the system itself, security aspects and such.

Even if it will be the same exact SSD on ext4 partition I'm afraid that restoration of the backup may not work as intended because of the encryption and resetting of the partitions.

Then it's not important whether I use a CLI or a UI to do the backup and restoration as long as I have all the necessary directions, but in fact I have no idea if I should use Clonezilla, rsync or Deja Dup. Timeshift only seems to be oriented to file backup rather than the system. What I need is a complete tutorial and for some reason it's very hard to find such a thing although I thought it would be the most common kind of practice. I just get confused with hundreds of contradictory advice on different distros while nobody agrees on any final recommendation.

My computer is a Galaxy Book 2 Pro 5G with Ubuntu 26.04 LTS desktop installed. I have a 5G SIM card inserted. After booting up, the system menu sometimes shows airplane mode, but rarely displays the 5G signal. When I open it (see attached photo), airplane mode is still on. If I turn off airplane mode, Bluetooth automatically turns on. Sometimes, if I restart the computer, the 5G signal button disappears. It seems like airplane mode is automatically on every time I boot up. Also, occasionally, system software updates and applications prompt me to check the network connection status. Could you please take a look? (Internet access is fine; it's just the cumbersome process of turning the 5G signal on and off after booting up.)

system software updates and applications prompt me to check the network connection status.

Help!

I’m completely new to Linux. I’ve dabbled in it over the last 20 or so years but get frustrated and end up back and the dreaded W. So hoping someone can help me with this problem.

I’m trying to run the P25 survey tool. I installed Ubuntu 26 LTS and have followed all the instructions in the read me and on the forum radio reference.com

I’m able to get the script to start but it seems to crash and I can’t figure out why. Below is the output from the terminal.

p25-survey --start 851 --stop 869 --sdr rtlsdr --gain 14 --threshold 14 --rr --hide-no-cc --output /tmp/survey-800.json  
P25 Survey — configuration  
range: 851.0000 – 869.0000 MHz (18.000 MHz)  
band: 800 MHz public safety (rebanded)  
step: 12.5 kHz (1440 steps)  
sdr: rtlsdr  
gain: 14.0 dB  
ppm: 0.0  
threshold: 14.0 dB above noise floor  
dwell: confirm=2.0s, max=12.0s  
output: /tmp/survey-800.json  
mode: FFT energy scan + targeted decode  
  
RadioReference authentication (credentials are not stored)  
Username: kd7jfv  
Password:  
Logged in as kd7jfv (subscription expires Never - Admin)  
  
Phase 1 — energy scan  
found 1 candidate(s)  
Phase 2 — P25 decode \[0/1 done, 0 control channels found, 0 skipped via resume\]  
┏━━━━━━┳━━━━━━┳━━━━━┳━━━━━┳━━━━━━┳━━━━━━┳━━━━━━┳━━━━━━┳━━━━━┳━━━━━┳━━━━━━┳━━━━━┓  
┃ Freq ┃ ┃ ┃ ┃ ┃ ┃ ┃ ┃ ┃ ┃ ┃ RR ┃  
┃ (MH… ┃ WACN ┃ SYS ┃ NAC ┃ RFSS ┃ Site ┃ Nbrs ┃ RSSI ┃ BER ┃ Dw… ┃ Sta… ┃ Ma… ┃  
┡━━━━━━╇━━━━━━╇━━━━━╇━━━━━╇━━━━━━╇━━━━━━╇━━━━━━╇━━━━━━╇━━━━━╇━━━━━╇━━━━━━╇━━━━━┩  
└──────┴──────┴─────┴─────┴──────┴──────┴──────┴──────┴─────┴─────┴──────┴─────┘  
⠙ Decoding 860.93750 MHz 0.0s / 12s budget  
Traceback (most recent call last):  
File "\<frozen runpy\>", line 198, in \_run_module_as_main  
File "\<frozen runpy\>", line 88, in \_run_code  
File "/usr/local/bin/p25-survey/\__main_\_.py", line 3, in \<module\>  
\_bootstrap.bootstrap()  
\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~\~^^  
File "/usr/local/bin/p25-survey/\_bootstrap/\__init_\_.py", line 262, in bootstrap  
run(import_string(env.entry_point))  
\~\~\~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/usr/local/bin/p25-survey/\_bootstrap/\__init_\_.py", line 38, in run  
sys.exit(module())  
\~\~\~\~\~\~^^  
File "/home/ben/.shiv/p25-survey_cf98cd7e70fb77e1d511189df9bcb98a11054b3c2171ee2fe18f31d9aedf4061/site-packages/p25_survey/cli.py", line 703, in main  
return \_run_scan(cfg)  
File "/home/ben/.shiv/p25-survey_cf98cd7e70fb77e1d511189df9bcb98a11054b3c2171ee2fe18f31d9aedf4061/site-packages/p25_survey/cli.py", line 360, in \_run_scan  
record = decode_candidate(  
freq_hz=cand.freq_hz,  
...\<7 lines\>...  
debug=10 if cfg.verbose else 0,  
)  
File "/home/ben/.shiv/p25-survey_cf98cd7e70fb77e1d511189df9bcb98a11054b3c2171ee2fe18f31d9aedf4061/site-packages/p25_survey/decoder.py", line 282, in decode_candidate  
from gnuradio import op25_repeater # noqa: PLC0415  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
ImportError: cannot import name 'op25_repeater' from 'gnuradio' (/usr/lib/python3/dist-packages/gnuradio/\__init_\_.py)

I’m troubleshooting a suspend problem on Ubuntu. When I close the lid or run sudo systemctl suspend, the laptop screen goes black, but it does not properly sleep or resume. The power button light stays on, and the machine becomes unresponsive. I have to hold the power button to force shutdown.

This started/persists on kernel:

Linux jamshaid-laptop 7.0.0-15-generic #15-Ubuntu SMP PREEMPT_DYNAMIC Wed Apr 22 16:06:43 UTC 2026 x86_64 GNU/Linux

Hardware:

HP Pavilion Gaming Laptop 15-ec2xxx AMD Cezanne APU NVIDIA GTX 1650 Mobile / Max-Q Realtek RTL8852AE Wi-Fi/Bluetooth

Relevant current suspend mode:

cat /sys/power/mem_sleep

Output:

[s2idle] deep

  Kernel command line includes:

  mem_sleep_default=s2idle

I previously tried deep as well, but the issue persisted.

The failure pattern in journalctl is consistent. The system reaches suspend entry and then never logs a suspend exit. Example from a failed boot:

May 22 20:12:55 systemd-logind[2690]: The system will suspend now!
  May 22 20:12:56 systemd[1]: Reached target sleep.target - Sleep.
  May 22 20:12:56 systemd[1]: Starting nvidia-suspend.service - NVIDIA system suspend actions...
  May 22 20:12:56 suspend[12351]: nvidia-suspend.service
  May 22 20:12:56 systemd[1]: nvidia-suspend.service: Deactivated successfully.
  May 22 20:12:56 systemd[1]: Finished nvidia-suspend.service - NVIDIA system suspend actions.
  May 22 20:12:56 systemd[1]: Starting systemd-suspend.service - System Suspend...
  May 22 20:12:56 systemd-sleep[12540]: Successfully froze unit 'user.slice'.
  May 22 20:12:56 systemd-sleep[12540]: Performing sleep operation 'suspend'...
  May 22 20:12:56 kernel: PM: suspend entry (s2idle)

After that, there is no PM: suspend exit. The next boot only happens after a hard power-off.

I originally had NVIDIA suspend hook errors like this:

NVRM: PreserveVideoMemoryAllocations module parameter is set.
  System Power Management attempted without driver procfs suspend interface.
  nv_pmops_suspend [nvidia] returns -5

I fixed that by enabling the NVIDIA systemd services:

sudo systemctl enable nvidia-suspend.service nvidia-resume.service nvidia-hibernate.service

Now they are enabled:

nvidia-suspend.service: enabled
  nvidia-resume.service: enabled
  nvidia-hibernate.service: enabled

NVIDIA driver details:

NVIDIA driver 580.142

NVIDIA module options:

options nvidia_drm modeset=1
  options nvidia NVreg_PreserveVideoMemoryAllocations=1
  options nvidia NVreg_TemporaryFilePath=/var/tmp

/proc/driver/nvidia/params confirms:

PreserveVideoMemoryAllocations: 1
  TemporaryFilePath: "/var/tmp"

I also switched PRIME mode from full NVIDIA mode to on-demand:

prime-select query

Output:

on-demand

But suspend still freezes in the same place.

Loaded relevant modules:

nvidia_uvm
  nvidia_drm
  nvidia_modeset
  nvidia
  amdgpu
  rtw89_8852ae
  rtw89_8852a
  rtw89_pci
  rtw89_core
  btusb
  bluetooth

There are also Realtek WiFi firmware/driver errors in recent logs:

rtw89_8852ae 0000:03:00.0: FW status = 0x44001100
  rtw89_8852ae 0000:03:00.0: FW BADADDR = 0xee00
  rtw89_8852ae 0000:03:00.0: SER catches error: 0x1000
  rtw89_8852ae 0000:03:00.0: firmware failed to ack for leaving ps mode
  rtw89_8852ae 0000:03:00.0: SER catches error: 0x4000

I tried turning WiFi off and stopping Bluetooth before suspend:

nmcli radio wifi off
  sudo systemctl stop bluetooth
  sudo systemctl suspend

But it still froze. Looking at logs, Bluetooth appears to have been restarted automatically by wireplumber/blueman right before suspend, so I’m not sure that test fully isolated the Realtek device.

One failed attempt showed:

NetworkManager: manager: rfkill: Wi-Fi hardware radio set disabled
  systemd: Stopping bluetooth.service - Bluetooth service...
  systemd: Stopped bluetooth.service - Bluetooth service.
  dbus-daemon: Activating via systemd: service name='org.bluez'
  systemd: Starting bluetooth.service - Bluetooth service...
  systemd: Started bluetooth.service - Bluetooth service.
  blueman-applet: adapter powered on while in off state, turning bluetooth on
  ...
  kernel: PM: suspend entry (s2idle)

  Sleep targets are not masked:

  systemctl is-enabled sleep.target suspend.target hibernate.target hybrid-sleep.target

Output:

static
  static
  static
  static

Things already tried:

1. Changed between deep and s2idle suspend modes.
2. Enabled NVIDIA suspend/resume/hibernate systemd services.
3. Verified NVIDIA PreserveVideoMemoryAllocations and TemporaryFilePath.
4. Switched PRIME mode to on-demand.
5. Tried WiFi off and Bluetooth stopped before suspend.
6. Checked for inhibitors; no persistent blocker found.

Current behavior:

• Lid close: screen goes black, power light remains on, system stalls.
• sudo systemctl suspend: same behavior.
• No successful resume.
• No "PM: suspend exit" in journal.
• Requires hard power-off.

My main questions:

1. How can I identify which device/driver is hanging after PM: suspend entry (s2idle)?
2. Could this be a kernel 7.0.0-15-generic regression with rtw89_8852ae, NVIDIA, or AMD suspend?
3. What is the correct way to fully isolate the Realtek RTL8852AE WiFi/Bluetooth module before suspend?
4. Are there known rtw89_pci module options for suspend issues, such as disabling ASPM or CLKREQ?
5. Should I boot and pin an older kernel such as 6.17.0-23-generic if suspend works there?

I am looking for a proper debugging path or workaround.

Update after following Ubuntu DebuggingKernelSuspend:

I tested pm_test=freezer.

Commands used:

sudo sh -c 'echo freezer > /sys/power/pm_test'
cat /sys/power/pm_test
sudo systemctl suspend

Result:

The system froze during pm_test=freezer and did not return automatically. I had to hard power off using the power button.

After reboot I restored pm_test:

sudo sh -c 'echo none > /sys/power/pm_test'
cat /sys/power/pm_test

Output:

[none] core processors platform devices freezer

I did not continue with devices/platform/processors/core because freezer is already the first failing pm_test stage.

Kernel:

Linux jamshaid-laptop 7.0.0-15-generic #15-Ubuntu SMP PREEMPT_DYNAMIC Wed Apr 22 16:06:43 UTC 2026 x86_64 GNU/Linux

Sleep mode:

cat /sys/power/mem_sleep

Output:

[s2idle] deep

suspend_stats after the hard power-off/reboot:

success: 0
fail: 0
failed_freeze: 0
failed_prepare: 0
failed_suspend: 0
failed_suspend_late: 0
failed_suspend_noirq: 0
failed_resume_noirq: 0
failed_resume_early: 0
failed_resume: 0
failures:
  last_failed_dev:
  last_failed_errno: 0
  last_failed_step:

Important log lines around the freezer test:

May 23 08:36:32 jamshaid-laptop sudo[9734]: jamshaid : TTY=/dev/pts/0 ; PWD=/home/jamshaid/suspend-debug ; USER=root ; COMMAND=/usr/bin/sh -c echo freezer > /sys/power/pm_test
May 23 08:36:32 jamshaid-laptop sudo[9745]: jamshaid : TTY=/dev/pts/0 ; PWD=/home/jamshaid/suspend-debug ; USER=root ; COMMAND=/usr/bin/systemctl suspend
May 23 08:36:32 jamshaid-laptop systemd-logind[2163]: The system will suspend now!
May 23 08:36:32 jamshaid-laptop ModemManager[1992]: [sleep-monitor-systemd] system is about to suspend
May 23 08:36:32 jamshaid-laptop NetworkManager[1919]: manager: sleep: sleep requested
May 23 08:36:33 jamshaid-laptop kernel: r8169 0000:02:00.0 eno1: Link is Down
May 23 08:36:33 jamshaid-laptop kernel: wlo1: deauthenticating from <AP> by local choice (Reason: 3=DEAUTH_LEAVING)

There is no clean return/resume recorded. The machine required hard power-off.

I have also created an archive with the collected logs:

suspend-debug-freezer-fail.tar.gz

I cannot update. Boot/efi is OK, can only disconnect.I try to avoid reinstallation...please see my Screenshot. Im̀ just a regular user. Thanks for your support!!!

Ralph

After downloading files (archives, images, deb packages), a kernel panic appears in the web browser and anywhere on the disk. Tell me how to fix it. Everything works fine, but because of this it is completely impossible for me to use my Ubuntu 26.04.

Kernel panic:

Link to Video

Specs:

• Ubuntu 26.04

• Intel 3556U

• 8GB RAM

• 480GB SATA SSD ROM

I use Ubuntu Desktop 25.10 and want to upgrade to Ubuntu 26.04
I have updated + upgraded my packages multiple times, yet the same error occurrs:

Reading cache
Distribution data outdated 
Please ensure all package updates are installed, and then try again. 
=== Command detached from window (Wed May 20 22:51:41 2026) ===
=== Command terminated with exit status 1 (Wed May 20 22:51:51 2026) ===

The output of sudo apt update and sudo apt upgrade:

gamer@black-mesa-terminal:~$ sudo apt update && sudo apt upgrade
[sudo: authenticate] Password: 
Hit:1 http://archive.ubuntu.com/ubuntu questing InRelease
All packages are up to date.    
Summary:                        
  Upgrading: 0, Installing: 0, Removing: 0, Not Upgrading: 0
gamer@black-mesa-terminal:~$ 

Doing sudo apt full-upgrade does not work, output being

gamer@black-mesa-terminal:~$ sudo apt full-upgrade 
Summary:                        
  Upgrading: 0, Installing: 0, Removing: 0, Not Upgrading: 0
gamer@black-mesa-terminal:~$ 

And here's the output of distro-info --supported

gamer@black-mesa-terminal:~$ distro-info --supported
jammy
noble
questing
gamer@black-mesa-terminal:~$ 

My personal guess is this is due to sssd

Linux Aspire 6.17.0-29-generic 24.04 24.04.4 LTS (Noble Numbat)

2026-05-18T08:30:52.269250+01:00 Aspire systemd[1]: anacron.service: Deactivated successfully.
2026-05-18T08:34:52.315822+01:00 Aspire NetworkManager[1371]: <info>  [1779089692.3150] dhcp4 (enp2s0): state changed new lease, address=192.168.1.72
2026-05-18T08:34:52.318697+01:00 Aspire NetworkManager[1371]: <info>  [1779089692.3184] device (enp2s0): conflict detected for IP address 192.168.1.72 with host D8:D6:68:A2:DA:D4
2026-05-18T08:34:52.320334+01:00 Aspire dbus-daemon[1228]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.13' (uid=0 pid=1371 comm="/usr/sbin/NetworkManager --no-daemon" label="unconfined")
2026-05-18T08:34:52.345213+01:00 Aspire systemd[1]: Starting NetworkManager-dispatcher.service - Network Manager Script Dispatcher Service...
2026-05-18T08:34:52.357449+01:00 Aspire dbus-daemon[1228]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
2026-05-18T08:34:52.357853+01:00 Aspire systemd[1]: Started NetworkManager-dispatcher.service - Network Manager Script Dispatcher Service.
2026-05-18T08:34:52.757254+01:00 Aspire NetworkManager[1371]: <info>  [1779089692.7570] dhcp4 (wlp3s0): state changed new lease, address=192.168.1.69
2026-05-18T08:35:01.596765+01:00 Aspire sssd_nss[6855]: Shutting down (status = 0)
2026-05-18T08:35:01.605212+01:00 Aspire systemd[1]: sssd-nss.service: Deactivated successfully.
2026-05-18T08:35:01.692639+01:00 Aspire systemd[1]: Started sssd-nss.service - SSSD NSS Service responder.
2026-05-18T08:35:01.778674+01:00 Aspire sssd_nss[6961]: Starting up

just upgraded to 26.04,, and all looks good, but "you tube" glitches , repeating black screen and then displays video resolution , video continues until next black screen about 1-2 mins later,.

any help would be helpful as i am sensitive to flicking lghts

firefox loads other pages ok

found fix . replaced nvidia drivers

sudo ubuntu-drivers devices

then sudo apt-get install < recomended driver> then restart

So I recently updated to 26.04, from 25.10. And now when I put my Laptop into sleep mode, It causes a kernel panic (Caps lock Key Flashing), and when I check the logs, It says "e1000e 0000:00:19.0 eno1: NIC Link is Down". This wasn't a problem in 25.10, until I tried 26.04's beta. That was the first instance of this error. Checking Resources, my Ethernet port uses the driver e1000e, and interface: eno1. I don't use Ethernet, I use WiFi (Specs Below)

--Edit--

Apparently my Wifi card (BCM4352) was the problem, and I fixed it by reinstalling the drivers for the card, *The problem was the kernel version

/dev/mapper/secrets /mnt/secrets ext4 defaults,nofail,x-systemd.device-timeout=5s 0  2

I have a small TPM-backed LUKS partition where I keep my secrets. I want the OS to be able to try to unlock the secrets partition, but if it fails, I want the OS to proceed with the boot process anyway. That way, if the unlock fails, my OS doesnt brick up and I can resolve the issue by re-enrolling the TPM key to the partition.

Since updating to Ubuntu 26.04 on my laptop, I've been having an issue where the screen just goes black after Ubuntu boots up. I see the boot animation, but as soon as I reach the login screen, the screen goes black. When I connect a second monitor, I can see that everything works fine on it. I’ve already found a workaround to reactivate the primary screen: if I briefly close the laptop and then open it again, everything suddenly works as it should. I generated a GPU log of the startup. You can see that after 9 seconds, the graphics card tries to communicate with the screen and apparently fails. A clean install did not fix the problem. Does anyone have any idea how to fix this?

Hardware specs: ASUS Viviobook TN3402QA AMD Ryzen 7 5800HS with integrated Radeon RX Vega 8 graphics card

Here is an excerpt of the log:

[    8.802777] [drm] Initialized amdgpu 3.64.0 for 0000:03:00.0 on minor 1
[    8.823121] fbcon: amdgpudrmfb (fb0) is primary device
[    8.823135] amdgpu 0000:03:00.0: [drm] fb0: amdgpudrmfb frame buffer device
[    8.842110] [drm] pre_validate_dsc:1667 MST_DSC dsc precompute is not needed
[    9.233067] amdgpu 0000:03:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data
[    9.449688] amdgpu 0000:03:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data
[    9.667098] amdgpu 0000:03:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data
[    9.940800] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed
[    9.961162] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed
[   10.001292] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1144: core_link_write_dpcd (DP_LINK_BW_SET) failed
[   10.021449] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1149: core_link_write_dpcd (DP_LINK_RATE_SET) failed
[   11.021179] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed
[   11.041226] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed
[   11.081319] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1144: core_link_write_dpcd (DP_LINK_BW_SET) failed
[   11.101481] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1149: core_link_write_dpcd (DP_LINK_RATE_SET) failed
[   12.150694] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed
[   12.171328] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed
[   12.212682] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1144: core_link_write_dpcd (DP_LINK_BW_SET) failed
[   12.233327] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1149: core_link_write_dpcd (DP_LINK_RATE_SET) failed
[   13.354679] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed
[   13.375666] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed
[   13.416987] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1144: core_link_write_dpcd (DP_LINK_BW_SET) failed
[   13.437652] amdgpu 0000:03:00.0: [drm] *ERROR* dpcd_set_link_settings:1149: core_link_write_dpcd (DP_LINK_RATE_SET) failed
[   13.803319] amdgpu 0000:03:00.0: [drm] enabling link 0 failed: 15
[   35.801921] amdgpu 0000:03:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data
[   47.886079] amdgpu 0000:03:00.0: [drm] PCIE GART of 1024M enabled.
[   47.886086] amdgpu 0000:03:00.0: [drm] PTB located at 0x000000F41FC00000
[   47.886113] amdgpu 0000:03:00.0: SMU is resuming...
[   47.887211] amdgpu 0000:03:00.0: dpm has been disabled
[   47.888408] amdgpu 0000:03:00.0: SMU is resumed successfully!

yesterday I updated my Ubuntu 24.04 LTS to 26.04 LTS. After updating, Nautilus file explorer is not displaying thumbnail previews for files added after the update. Is this a bug? How to resolve it? Thanks for the help.

This issue seems to have arisen after upgrading from 22.04 to 24.04.

• When first logging in, Nautilus will open a folder in about 0.2-0.5 seconds, this is tolerable but still a lot slower than Thunar which is perceptually instantaneous (as it should be, my system is fast and uses SSDs).
• After opening Steam, it takes much longer to open a folder, particularly if there are "many" (100-1000) files, it may take 10-20 seconds to open a folder. Thunar is still instantaneous.
• browsing away from a folder and then back to it, still results in it taking 10 seconds to load, there has been no benefit from caching.
• Closing Steam will result in the time going back down to 0.2-0.5 seconds.
• After a while (maybe 10 minutes?) the slowdown seems to go away even with Steam remaining open.
• Exiting and reopening Steam will make the slowdown occur again, though it seems to recover more quickly, probably because Steam is doing less.
• I don't think the issue is specific to Steam, with Steam just being a large application that touches a lot of things. Also, I'm clearly not blaming Steam here, as Thunar remains instantaneous and Steam doesn't seem to impact any other applications.

Relevant System specs:

• Ubuntu 24.04.1 LTS
• Intel Core i5-12400F CPU
• 32 GB ram
• SSDs

Things I have tried:

apt purge nautilus && apt install nautilus

• Setting ulimit much higher.

• Purging ~/.cache

• Purging anything I could find under ~/ related to nautilus

Looking for errors in syslog - there's nothing.

Running Nautilus with debug messages. During the 10 seconds, it is doing stuff with thumbnails, like this but a lot longer:

(org.gnome.Nautilus:24053): nautilus-file-DEBUG: 11:36:24.060: Called file_get_icon(), at size 32
(org.gnome.Nautilus:24053): nautilus-file-DEBUG: 11:36:24.060: Returning thumbnailed image, at size 22 32
(org.gnome.Nautilus:24053): nautilus-file-DEBUG: 11:36:24.071: Called file_get_icon(), at size 32
(org.gnome.Nautilus:24053): nautilus-file-DEBUG: 11:36:24.077: Called file_get_icon(), at size 32
(org.gnome.Nautilus:24053): nautilus-file-DEBUG: 11:36:24.077: Returning thumbnailed image, at size 30 32
(org.gnome.Nautilus:24053): nautilus-file-DEBUG: 11:36:24.093: Called file_get_icon(), at size 32
(org.gnome.Nautilus:24053): nautilus-file-DEBUG: 11:36:24.104: Called file_get_icon(), at size 32

The log doesn't show anything else happening during the 10 seconds other than thumbnail related stuff.

Possible solutions:

For me an obvious solution is to just use Thunar, even though I'm used to Nautilus.

However considering this is a fairly reproducible on my system, I'd be interested in trying to debug it further.

Edit: Subsequently I have upgraded to newer versions of Ubuntu and no longer have the issue in 25.04, as such I'm unable to verify a fix or that the issue still exists in 24.04.

After a dist upgrade, I get a lot of warnings like this one:

Warning from /etc/apparmor.d/sbin.dhclient (/etc/apparmor.d/sbin.dhclient line 4): apparmor_parser: File '/etc/apparmor.d/sbin.dhclient' missing feature abi, falling back to default policy feature abi

1. what does it means? Google does not help, or I was not able to search it well
2. is it a problem?
3. if so, how can I fix it?

So, my laptop has been "freeze crashing" randomly (System totally unresponsive, mouse freezed, clock not going forward, no keyboard commands have any effect, and the only way to get out of it is hard rebooting using physical power button), from anywhere to a few minutes to several hours of using my computer.

So naturally, I investigated the issue and tried to find a fix. After looking at the kernel log i saw that the last logged events before freezing is several "Hardware Errors":

kernel: mce: [Hardware Error]: Machine check events logged

So, I search it up and try to find solutions. And I did, I found this post. Which basically tells me to add a few boot parameters. And it does fix the issue, I haven't had any more Hardware Errors logged, or any random freezes ever since. These are the boot parameters:

noapic pci=assign-busses apicmaintimer idle=poll reboot=cold,hard

But the issue is, now my laptop is idling at a way higher temperature when using these boot parameters. Around 70 degrees Celsius, instead of 35-40. Now, obviously I've checked System Monitor to see if there is anything taking up CPU usage, but there's nothing. It's using anywhere between 0 to 3% of CPU utilization on all 4 threads, nothing out of the ordinary.

And I know its the boot parameters causing this issue, because I've tried removing them, and after rebooting, fans aren't spinning as loudly and its idling at a normal temperature. But, the Hardware Errors are back, and so are the random freezes.

I am quite a novice at Linux stuff, so I literally have no idea what these boot parameters do. Can someone experienced tell me what it is they're doing, and why they're causing my CPU to idle so much hotter?

EDIT #1

So thanks to the help of matigo and Doug, I was told that the idle=poll parameter is disabling the idle system for the CPU, which obviously make the CPU run hotter and create more waste heat.

When removing that boot parameter, the Hardware Errors are back.

So, my freezes and Hardware Errors seem to have something to do with how the CPU switches between idle states.

My CPU is an Intel Core i7-7500U

This is the output from running grep . /sys/devices/system/cpu/cpu0/cpuidle/state*/name:

/sys/devices/system/cpu/cpu0/cpuidle/state0/name:POLL
/sys/devices/system/cpu/cpu0/cpuidle/state1/name:C1
/sys/devices/system/cpu/cpu0/cpuidle/state2/name:C1E
/sys/devices/system/cpu/cpu0/cpuidle/state3/name:C3
/sys/devices/system/cpu/cpu0/cpuidle/state4/name:C6
/sys/devices/system/cpu/cpu0/cpuidle/state5/name:C7s
/sys/devices/system/cpu/cpu0/cpuidle/state6/name:C8
/sys/devices/system/cpu/cpu0/cpuidle/state7/name:C9
/sys/devices/system/cpu/cpu0/cpuidle/state8/name:C10

So basically what I need help with is this, to get rid of these Hardware Errors and crashes without completely disabling the CPU idle system, if possible.

I am trying to connect to a my SSH server (running on Ubuntu 16.04.2 LTS) from my local machine (Ubuntu 18.04.03 LTS).

I have created a private and public key on my local machine and copied my public key to my SSH server's authorized_keys file.

I could log in with ssh root@ip-address and I have access (as root user), but when I tried to log in as another user with command ssh name@ip-address, it generated an error message:

name@ip_address: Permission denied (publickey)

What can I do so the name@ip-address could be accessed?

I installed Ubuntu16.04, and set firefox as default browser, whenever I open links from external apps these are open as blank tabs in new browser window (no actual redirection to site, just a blank tab).

When I try to run any java program or simply java -version in my ubuntu 14.04 system getting the following error:

"java: error while loading shared libraries: libjli.so cannot open shared object file: no such file or directory"`

I have tried the solution in the this link but it doesn't work

Please help me how to make java work in my system