Public bug reported:
When I tried to suspend my system today for the second time, 'systemctl
suspend' was hanging -- having no effect. (Yesterday I had a full
system freeze, which took two reboots to recover from. Such a freeze
never happened before, so I immediately suspected kernel
4.15.0-151-generic, which was running for the first time, having been
installed the day before.) The system now refusing to go to sleep made
me look in the log files, and I saw this in syslog:
kernel: [ 602.301844] BUG: unable to handle kernel paging request at
ffff9fdd3248d5ad
kernel: [ 602.301861] IP: css_release_work_fn+0xa9/0x1a0
kernel: [ 602.301864] PGD 3b799067 P4D 3b799067 PUD 0
kernel: [ 602.301869] Oops: 0000 [#1] SMP PTI
The complete relevant fragment of the syslog file is attached.
As the system is not working properly now (systemctl not doing its job,
gedit taking fifteen seconds to save a file, 'su -' hanging...), I will
reboot now, and tomorrow will go back to kernel 4.15.0-147-generic,
which gave me no troubles.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "relevant part of the syslog file"
https://bugs.launchpad.net/bugs/1938430/+attachment/5514582/+files/syslog.fragment
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https://bugs.launchpad.net/bugs/1938430
Title:
BUG: unable to handle kernel paging request after 'systemctl suspend'
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