Update to KUbuntu 25.10

I have decided to update my main machine to Kubuntu 25.10 from 24.10 as I got a notification that 24.10 will stop receiving updates soon. But the process was not smooth, so I decided to collect some receipts here, as I feel that I will face the same during the next upgrade

After I execute do-release-upgrade I faced next issue


Unpacking coreutils-from-uutils (0.0.0~ubuntu24) ...

Replacing files in old package coreutils (9.5-1ubuntu1.25.04.2) ...

dpkg: error processing archive /var/cache/apt/archives/coreutils-from-uutils_0.0.0~ubuntu24_all.deb (--unpack):

trying to overwrite '/usr/bin/sha3sum', which is also in package libdigest-sha3-perl (1.05-1build5)

Errors were encountered while processing:

/var/cache/apt/archives/coreutils-from-uutils_0.0.0~ubuntu24_all.deb

Error: Sub-process /usr/bin/dpkg returned an error code (1)

Unpacking coreutils-from-uutils (0.0.0~ubuntu24) ...

Replacing files in old package coreutils (9.5-1ubuntu1.25.04.2) ...

dpkg: error processing archive /var/cache/apt/archives/coreutils-from-uutils_0.0.0~ubuntu24_all.deb (--unpack):

trying to overwrite '/usr/bin/sha3sum', which is also in package libdigest-sha3-perl (1.05-1build5)

Errors were encountered while processing:

/var/cache/apt/archives/coreutils-from-uutils_0.0.0~ubuntu24_all.deb

Error: Sub-process /usr/bin/dpkg returned an error code (1)

After some manipulations I was able to fix this by removing the package and force reinstall


$ sudo dpkg -i --force-overwrite --force-breaks --ignore-depends=coreutils,libdigest-sha3-perl /var/cache/apt/archives/coreutils-from-uutils_0.0.0~ubuntu24_all.deb

$ sudo apt --fix-broken install

$ sudo apt dist-upgrade

$ sudo dpkg -i --force-overwrite --force-breaks --ignore-depends=coreutils,libdigest-sha3-perl /var/cache/apt/archives/coreutils-from-uutils_0.0.0~ubuntu24_all.deb

$ sudo apt --fix-broken install

$ sudo apt dist-upgrade

Then I faced few similiar errors but with the same approach I was able to upgrade the system. And then I rebooted..

After the reboot I found a black screen and my monitors went to stand by mode. Gemini said that I need to re-install nvidia drivers or use built-in nouveau.

I was able to switch to terminal from this black screen by using shortcut Ctrl+Alt+F4, but I found that I don’t have internet as my WiFi wasn’t enabled.

I have enabled it by using next


# make sure that your wifi is here
$ sudo nmcli device

# find the available network SSIDs
$ sudo nmcli device wifi list

# connect to the network
$ sudo nmcli device wifi connect "MyHomeWiFi" --ask

$ ping 8.8.8.8

# make sure that your wifi is here

$ sudo nmcli device

# find the available network SSIDs

$ sudo nmcli device wifi list

# connect to the network

$ sudo nmcli device wifi connect "MyHomeWiFi" --ask

$ ping 8.8.8.8

I tried to use nouveau drivers but this didn’t help, anyway here is the steps


$ sudo apt purge nvidia-*
$ sudo apt autoremove

$ sudo nano /etc/modprobe.d/blacklist-nvidia
blacklist nvidia
blacklist nvidia-drm
blacklist nvidia-modeset

$ sudo update-initramfs -u
$ reboot

# to check that your system using nouveau drivers
$ lspci -knn | grep -i vga -A3

# you will see: Kernel driver in use: nouveau

$ sudo apt purge nvidia-*

$ sudo apt autoremove

$ sudo nano /etc/modprobe.d/blacklist-nvidia

blacklist nvidia

blacklist nvidia-drm

blacklist nvidia-modeset

$ sudo update-initramfs -u

$ reboot

# to check that your system using nouveau drivers

$ lspci -knn | grep -i vga -A3

# you will see: Kernel driver in use: nouveau

Then I chatted with Gemini and decided to back to Nvidia drivers installation

I have reinstalled them as follow


# remove current driver
$ sudo apt purge nvidia-*

# find the latest available
$ sudo apt 

# install it + headers
$ sudo apt-install --reinstall nvidia-driver-580-open linux-headers-$(uname -a)

# remove current driver

$ sudo apt purge nvidia-*

# find the latest available

$ sudo apt

# install it + headers

$ sudo apt-install --reinstall nvidia-driver-580-open linux-headers-$(uname -a)

I checked the errors like that


$ sudo journalctl -xeu sddm -n50

$ sudo journalctl -xeu sddm -n50

and found next error

Unable to find autologin session entry plasmax11

I though it was the reason of the problem so I tried to resolve it by commenting autologin options in


$ sudo nano /etc/sddm.conf
...
# [Autologin]
# Relogin=false
# Session=plasmax11
# User=user-name

$ sudo nano /etc/sddm.conf

...

# [Autologin]

# Relogin=false

# Session=plasmax11

# User=user-name

Then I tried to restart sddm, but this didn’t help


$ sudo systemctl restart sddm.service

$ sudo systemctl restart sddm.service

Then I start debugging with Gemini, I found some errors in the Xorg log


$ cat /var/log/Xorg.0.log | grep -i "EE\|WW"

$ cat /var/log/Xorg.0.log | grep -i "EE\|WW"

The errors looked liked

(EE) No Layout section. Using the first Screen section
(EE) Screen 0 deleted because of no matching config section
(EE) A screen section was not found

Gemini said that the problem probably with the xorg.conf, I checked it and found that it doesn’t exists


$ ls /etc/X11/xorg.conf

$ ls /etc/X11/xorg.conf

so I re-created it via nvidia utility


$ sudo nvidia-config

$ sudo nvidia-config

Nvidia created the next file


nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 580.95.05

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

nvidia-xconfig: X configuration file generated by nvidia-xconfig

# nvidia-xconfig: version 580.95.05

Section "ServerLayout"

Identifier "Layout0"

Screen 0 "Screen0"

InputDevice "Keyboard0" "CoreKeyboard"

InputDevice "Mouse0" "CorePointer"

EndSection

Section "Files"

EndSection

Section "InputDevice"

# generated from default

Identifier "Mouse0"

Driver "mouse"

Option "Protocol" "auto"

Option "Device" "/dev/psaux"

Option "Emulate3Buttons" "no"

Option "ZAxisMapping" "4 5"

EndSection

Section "InputDevice"

# generated from default

Identifier "Keyboard0"

Driver "kbd"

EndSection

Section "Monitor"

Identifier "Monitor0"

VendorName "Unknown"

ModelName "Unknown"

Option "DPMS"

EndSection

Section "Device"

Identifier "Device0"

Driver "nvidia"

VendorName "NVIDIA Corporation"

EndSection

Section "Screen"

Identifier "Screen0"

Device "Device0"

Monitor "Monitor0"

DefaultDepth 24

SubSection "Display"

Depth 24

EndSubSection

EndSection

And after the reboot I saw the login screen.

Then I found that some of the applications based on chrome could not start.


$ google-chrome --disable-gpu

[25133:25133:1124/173051.102711:ERROR:content/browser/gpu/gpu_process_host.cc:999] GPU process exited unexpectedly: exit_code=139
...
[25133:25133:1124/173053.402366:FATAL:content/browser/gpu/gpu_data_manager_impl_private.cc:415] GPU process isn't usable. Goodbye.
...
[1124/173053.441150:ERROR:third_party/crashpad/crashpad/util/process/process_memory_range.cc:75] read out of range
...
[1124/173053.456504:ERROR:third_party/crashpad/crashpad/util/process/process_memory_range.cc:75] read out of range
Trace/breakpoint trap (core dumped)

$ google-chrome --disable-gpu

[25133:25133:1124/173051.102711:ERROR:content/browser/gpu/gpu_process_host.cc:999] GPU process exited unexpectedly: exit_code=139

...

[25133:25133:1124/173053.402366:FATAL:content/browser/gpu/gpu_data_manager_impl_private.cc:415] GPU process isn't usable. Goodbye.

...

[1124/173053.441150:ERROR:third_party/crashpad/crashpad/util/process/process_memory_range.cc:75] read out of range

...

[1124/173053.456504:ERROR:third_party/crashpad/crashpad/util/process/process_memory_range.cc:75] read out of range

Trace/breakpoint trap (core dumped)

Some strange behavior also appeared, for example the “Spare Layouts” functionality didn’t work.

After some investigation I found that I was booted to buggy “Wailand” instead of “X11”.

Current manager can be checked like the next


$ echo $XDG_SESSION_TYPE
wayland

$ echo $XDG_SESSION_TYPE

wayland

To change to X11 you need to install next package


$ sudo apt install plasma-session-x11

$ sudo apt install plasma-session-x11

And after installation you need to log out from the current session and choose the “Plasma (X11)” instead of “Wayland”.

And that’s all)) Don’t start an upgrade if you don’t have couple of hours for the configuration issues debugging ))

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Update to KUbuntu 25.10

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