Bug 440991

Summary:	Upgrade to Kernel 5.11.0-25 with Nvidia 340.108 Fails to Show UI Login
Product:	[KDE Neon] neon	Reporter:	Eric R <aer0usa>
Component:	Packages User Edition	Assignee:	Neon Bugs <neon-bugs>
Status:	RESOLVED WAITINGFORINFO
Severity:	normal	CC:	aer0usa, jr, neon-bugs, sitter
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Eric R 2021-08-15 01:32:30 UTC

SUMMARY
Today I updated Neon 5.22.4, using Discover, and after the installation(s) and reboot(s), laptop froze on Neon startup splash. I was able to Alt-F2 to log in via CLI.

I found a [thread on the Neon forums](https://forum.kde.org/viewtopic.php?f=309&t=172175&sid=683dca1e932bc55ef0216b2f1b9c2539) that suggested there is a problem with the Nvidia 340.108 driver under Kernel 5.11.0-25, and to use the Grub menu to boot to Kernal 5.8.0-63 instead. This workaround has allowed me to log into Plasma.

STEPS TO REPRODUCE
1. Apply current updates in Discover
2. Allow machine to install and reboot

OBSERVED RESULT
Neon Boot Splash freezes, but I can Alt-F2 to the CLI.

EXPECTED RESULT
Expected to be able to log in via GUI/Plymouth login screen

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.22.4
KDE Frameworks Version: 5.84.0
Qt Version: 5.13.3

ADDITIONAL INFORMATION
sudo inxi -Fxxx: https://bin.privacytools.io/?66a914c115f9d56f#2J19XX2qKhZmjtwFA1zHMyeS4LyeAcM5E51MdeHMNJhk

Please let me know if I can provide more info. Thanks!

Comment 1 Eric R 2021-08-24 14:27:00 UTC

Hi. I found [this thread on the Nvidia Linux Dev Forums]
(https://forums.developer.nvidia.com/t/nvidia-340-108-driver-kernel-5-11-support/182663)

...that points out incompatibility between nvidia-340.108 and the 5.11.x kernel.

I will report my bug there.

It looks like Nvidia has been notified, but they don't seem to be doing anything about it at the moment.

I have uninstalled `nvidia-340` and gone back to the nouveau driver, and all seems well in Neon 5.22.4 with the 5.11.0-27 kernel (updated since I reported this).

I don't know if any further action is required here, other than watching for an update to nvidia-340.

Comment 2 Eric R 2024-06-18 00:55:36 UTC

We can probably close this. I worked around it by removing the Nvidia drivers and using Nouveau.

Comment 3 Carlos De Maine 2025-09-20 09:35:24 UTC

Thank you for your bug report! 
However this bug report was created/provided previous to 01/01/2023 and also has not received any updates since  before 01/01/2025. 
Unfortunately KDE neon no longer provides updates for anything older than noble 24.04 based edition's.
Please upgrade to KDE neon noble and if you can reproduce the issue after upgrading to an active version, feel free to re-open this bug report.
Thanks for understanding!