*** This bug is a duplicate of bug 1938013 ***
https://bugs.launchpad.net/bugs/1938013
It seems that this is a duplicate of bug #1938013.
** This bug has been marked a duplicate of bug 1938013
4.15.0-151 is freezing various CPUs
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https://bugs.launchpad.net/bugs/1938430
Title:
kernel 4.15.0-151 tends to freeze after having been suspended
Status in linux package in Ubuntu:
New
Bug description:
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.
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