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 1931001
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.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1931001
Title:
kernel: watchdog: BUG: soft lockup - CPU#3 stuck for 22s!
Status in linux package in Ubuntu:
Incomplete
Bug description:
Ubuntu 20.04 LTS and Ubuntu 21.04 occasionally boots with very bad
performance and very unresponsive to user input on Lenovo laptop
Lenovo 300e 2nd Gen 81M9 (LENOVO_MT_81M9_BU_idea_FM_300e 2nd G).
When this happens you can read this kind of messages on journal:
---
root@alumne-1-58:~# journalctl | grep "BUG: soft"
may 20 21:44:35 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 22s! [swapper/3:0]
may 20 21:44:35 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 22s! [swapper/3:0]
may 22 09:33:34 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#0 stuck
for 22s! [swapper/0:0]
may 24 16:45:14 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#1 stuck
for 23s! [prometheus-node:4220]
may 24 16:45:14 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#0 stuck
for 23s! [swapper/0:0]
jun 03 00:01:09 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#0 stuck
for 22s! [swapper/0:0]
jun 03 00:01:09 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#0 stuck
for 23s! [swapper/0:0]
jun 03 00:01:09 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#1 stuck
for 22s! [swapper/1:0]
jun 03 00:01:09 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#0 stuck
for 22s! [swapper/0:0]
jun 03 00:02:15 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#0 stuck
for 21s! [swapper/0:0]
jun 05 08:22:58 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 22s! [irq/138-iwlwifi:1044]
jun 05 08:25:06 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#2 stuck
for 22s! [swapper/2:0]
jun 05 08:25:06 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 22s! [irq/138-iwlwifi:1044]
jun 05 08:26:42 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#1 stuck
for 23s! [lxd:3975]
jun 05 08:26:42 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#2 stuck
for 23s! [swapper/2:0]
jun 05 08:26:42 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 23s! [irq/138-iwlwifi:1044]
jun 05 08:27:38 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 23s! [irq/138-iwlwifi:1044]
jun 05 08:28:34 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 22s! [irq/138-iwlwifi:1044]
jun 05 08:29:46 alumne-1-58 kernel: watchdog: BUG: soft lockup - CPU#3 stuck
for 22s! [irq/138-iwlwifi:1044]
root@alumne-1-58:~#
---
Usually if you reboot everything works fine but it's very annoying
when happens.
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