5.13.0-40-generic kernel panic

[Pietro Pasotti]

❯ lsb_release -rd
Description: Ubuntu 20.04.4 LTS
Release: 20.04

The kernel panicked after a restart.

The screen displayed:

0.524526] pci 0000:00:07.0: DPC: RP PIO log size 0 is invalid
0.5261261 pci 0000:00:07.3: DPC: RP PIO log size O is invalid
0.8234791 Kernel panic
- nat syncing: UFS: Unable to mount root fs on unknown-block(0,0)
0.823495] CPU: 4 PID: 1 Comm: swapper/O Not tainted 5.13.0-40-generic #45"20.04.1-Ubuntu
0.8235091 Hardware name: Dell Inc. XPS 15 9510/01V413, BIOS 1.5.1 08/20/2021
0.8235211 Call Trace:
0.8235291 (TASK>
0.823535] dump_stack+0x7d/0x9c
0.823544] panic+0x101/OxZe3
0.823552]
mount_ block_root+0x299/0x31d
0.823561]
mount_root+0x38/Ox3a
0.8235681
prepare_namespace+0x13f/0x18d
0.8235771 kernel_init_frecable+0x26a/0x290
0.8235871
? rest_init+0xha/Oxba
0.823596]
kernel_init+0xe/0x116
0.823603]
ret_from_fork+0x1f/0x30
0.8236111
C/TASK>
0.8236941 Kernel Offset: 0x21c00000 from OxffffffffB1000000 (relocation range: Oxffffffff80000000-Oxffffffftbfffffff)
0.823712] ---I end Kernel panic
- not suncing: UFS: Unable to mount root fs on unknown-block(0, 0) ]-

And was unresponsive after that.
I typically suspend my machine and only restart once in a while. Decided to do so yesterday because some (built-in keyboard) keys became unresponsive (fn+F8 fn+f9 to control screen brightness, and the on-off key to suspend/resume).

I could fortunately use the previous kernel and that seems to work fine.

[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/1970722/+editstatus and add the package name in the text box next to the word Package.

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