[SOLVED] Kubuntu stuck at boot screen during shutdown

[thombou]

Hi all,
I am running Kubuntu 24.04 on my laptop.
When I shut down the computer, it gets stuck displaying the boot screen (Dell and Kubuntu logos). After a timeout of roughly 3mins, a lot of logs are printed to the screen and the PC stops.
I cannot access those logs in journalctl since they appear after the logging has been stopped. From what I can see, it displays lines like:

flip_done timed out
[CRTC:80: pipe A] commit wait timed out

avril 02 13:40:54 precision3571 systemd-journald[489]: Journal stopped
-- Boot c0baf7f9b9ab4b6f8d84551412687422 --
avril 02 13:43:56 precision3571 kernel: Linux version 6.8.0-57-generic (buildd@lcy02-amd64-040) (x86_64-linux-gnu-gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, GNU ld (GNU Binutils for Ubuntu) 2.42) #59-Ubuntu SMP PREEMPT_DYNAM...

I have seen in many posts that the issue might come from nvidia drivers. I have tried to use the "nouveau" driver as well as the NVIDIA ones (installed using the additional driver option in system settings) and I see the same issue.

Any idea what is going wrong?

[skyfishgoo]

are you sure you actually switched to the kernel drivers?

the best way to be sure is completely remove anything related to nvidia by

sudo apt update
sudo apt purge *nvidia*
sudo apt autoremove
reboo​

or it could be you are running an older kernel that doesn't support your hw.. .then try

#to ensure all the correct updates are received
sudo apt install --install-recommends linux-generic-hwe-24.04​

[thombou]

Hi,
I followed your instructions

Checking driver used gives me:

lspci -nnk
---
0000:01:00.0 3D controller [0302]: NVIDIA Corporation TU117GLM [T600 Laptop GPU] [10de:1fb6] (rev a1) [/COLOR]
       Subsystem: Dell Precision 3571 [1028:0b10]
       Kernel driver in use: nouveau
       Kernel modules: nvidiafb, nouveau
---
​

I only copied the node that has a hit with a nvdia grep command (not copied here). I´d say that in my case, no nvidia driver is in use (and I think it was the case before the purge command). The problem persisted after this operation.

Regarding this:

sudo apt install --install-recommends linux-generic-hwe-24.04​

I did it and it seems that it fixed the issue. After least after a few reboot the problem did not occur.


So I´d say that it did the trick!
Any idea how I could have guessed/noticed that on my own? (which test I should gave done for instance?)

[skyfishgoo]

the hwe kernel is newer and offers more robust support for a wider variety of devices.... just a wild guess on my part

glad it helped, not sure why the hwe is not the default kernel but there you go.

[claydoh]

glad it helped, not sure why the hwe is not the default kernel but there you go.

It is, but not for installs using the original 24.04 ISO and maybe the 24.04.1 image. Now I could swear that this changed some time ago and all Ubuntu LTS desktop installs were supposed to get HWE from the beginning but it hasn't been the case here.

Maybe Kubuntu doesn't follow Ubuntu in this? I keep forgetting to ask. Normal Ubuntu LTS had it ootb from the beginning.