Boot and shutdown take several minutes. "watchdog: BUG: soft lockup - CPU#0 stuck for 26s!" followed by nvidia kernel crash

[Arild Johnsen]

My system has been running smoothly until Kernel 5.15.0-50 (and 5.15.0-52) was installed. Now boot and shutdown take several minutes. I have an Nvidia Gforce 1050 and Nvidia driver 515. Boot and shutdown run witout delay with the Nouveau and Nvidia 390 drivers but the OpenCl is unavailable

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Libera.chat.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1995021/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Arild Johnsen (arild45)]

For further details please see this thread https://forums.linuxmint.com/viewtopic.php?f=46&t=384285 in the Linux Mint forum where I am the user "stovdal"

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

Next time you experience a slow boot, please then run:

  journalctl -b0 > journal.txt

and attach the resulting text file here.

[Arild Johnsen (arild45)]

I'm sorry for the late reply, I've beem away for two weeks. Please find the journal.txt file attached.

[Arild Johnsen (arild45)]

I do not believe the journal.txt file submitted in my last post was complete. I try again.

[Arild Johnsen (arild45)]

My final attempt to submit the jornal.txt file.Sorry for the mess.

[Daniel van Vugt (vanvugt)]

Thanks. It does seem to be a crash in the Nvidia driver. Maybe as a workaround try:

 * Kernel parameter "nosplash"

 * Nvidia-520 instead.

Although the logs also mention "kernel: *BAD*gran_size" so I'm wondering if that means there is faulty RAM, which would easily explain the crashes.

[Arild Johnsen (arild45)]

Thanks a lot for trying to help. Here are my findings so far:
1. The latest kernel working without issues is version 5.15.0.48. The versions
5.15.0.50, 5.15.0.52 and 5.15.0.53 are all causing the minutes long boot and shutdown in combination with the Nvidia drivers 470, 510, 515 and 520. Boot and shutdown are also without issues for all Kernels in combination with the Nouveau driver and Nvidia driver 390. However, OpenCl is not available with those two drivers. I need OpenCl for image editing with darktable
2. I ran memtest to verify the state of the RAM. Test passed without errors
3. I tried Kernel parameter "nosplash". It didn't make any difference
4. For the moment I stick with Kernel 5.15.0.48 and Nvidia driver 515

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1995021

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Arild Johnsen (arild45)]

I confirm that the bug has been fixed. I just received an updated Nvidia driver, version 525. Once installed my system is now back to normal, i.e. smooth boot and shutdown. Thanks a lot.