Hi, starting with kernel 4.19 my Lenovo ThinkPad X1 Carbon 5th no longer properly suspends.
This is 100% reproducible and git bisect points to the following commit: > [be45bf5395e0886a93fc816bbe41a008ec2e42e2] watchdog/softlockup: Fix > cpu_stop_queue_work() double-queue bug > be45bf5395e0886a93fc816bbe41a008ec2e42e2 is the first bad commit > commit be45bf5395e0886a93fc816bbe41a008ec2e42e2 > Author: Peter Zijlstra <[email protected]> > Date: Fri Jul 13 12:42:08 2018 +0200 > > watchdog/softlockup: Fix cpu_stop_queue_work() double-queue bug > > When scheduling is delayed for longer than the softlockup interrupt > period it is possible to double-queue the cpu_stop_work, causing list > corruption. > > Cure this by adding a completion to track the cpu_stop_work's > progress. > > Reported-by: kernel test robot <[email protected]> > Tested-by: Rong Chen <[email protected]> > Signed-off-by: Peter Zijlstra (Intel) <[email protected]> > Cc: Linus Torvalds <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Fixes: 9cf57731b63e ("watchdog/softlockup: Replace "watchdog/%u" threads > with cpu_stop_work") > Link: > http://lkml.kernel.org/r/[email protected] > Signed-off-by: Ingo Molnar <[email protected]> > > :040000 040000 6aca2dbb84bc33fe442b18b3d0a135c27adff7b9 > 2710af12d32e4b98df07768716689b213bce45fc M kernel The bugzilla reports have some additional details: * https://bugzilla.redhat.com/show_bug.cgi?id=1671504 * https://bugzilla.kernel.org/show_bug.cgi?id=202679 * https://bugzilla.kernel.org/show_bug.cgi?id=202137 I'm happy to provide additional information or test a patch or two (as long as it doesn't eat up my notebook ;)) Best regards Thomas
