Description of problem:
After upgrade to 4.15.14 (from 4.15.14), suspend is broken on Acer ES1-111
[41935.057157] Freezing user space processes ... (elapsed 0.005 seconds) done.
[41935.062563] OOM killer disabled.
[41935.062565] Freezing remaining freezable tasks ...
[41955.080036] Freezing of tasks failed after 20.009 seconds (0 tasks refusing to freeze, wq_b
[41955.080052] Showing busy workqueues and worker pools:
[41955.080061] workqueue pm: flags=0x4
[41955.080067] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=0/0
[41955.080090] delayed: pm_runtime_work
[41955.080109] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=0/0
[41955.080129] delayed: pm_runtime_work, pm_runtime_work
[41955.080152] workqueue writeback: flags=0x4e
[41955.080156] pwq 8: cpus=0-3 flags=0x4 nice=0 active=0/0
[41955.080173] delayed: wb_workfn, wb_workfn
[41955.080198] workqueue usb_hub_wq: flags=0x4
[41955.080203] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/0
[41955.080221] in-flight: 90:hub_event hub_event
[41955.080261] pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=0s workers=5 idle: 18688 16646 24286 18457
[41955.080571] Restarting kernel threads ... done.
[41955.081340] OOM killer enabled.
[41955.081344] Restarting tasks ... done.
Version-Release number of selected component (if applicable):
Always since 4.15.14
Steps to Reproduce:
2. Login to desktop
3. Fn-F4 or Session Menu > Suspend
System hangs for 20 seconds, then recovers. Shows errors in bug description
Should suspend. Never had this problem before.
Sorry, I meant upgrade from 4.15.13 to 4.15.14. So, this bug was introduced in kernel 4.15.14 exactly.
Can you see if 4.15.16 works https://koji.fedoraproject.org/koji/buildinfo?buildID=1067740 (I'll be filing this in bodhi shortly)
If that doesn't work, you can try a kernel bisect
Yes, I can do that! Thanks.
Regarding a bisect, I completely understand how that would help. But, "try a kernel bisect" isn't enough to go on. I link to Fedora instructions would be really helpful.
I've built many kernels, but that was 20 years ago. It was grub 0.99 era. A lot has changed. Could you at least link to some official Fedora documentation for building one's own kernel and booting it? I found a page on fedbisect, which is good, but I've forgotten some of these other things.
To Fedora's credit, I stopped practicing these skills because in the last 15 years, I've never had serious kernel bugs persist for more than a few kernel updates.
Success! 4.15.16 works and does not have any problems with suspend for me on my system. Thank you, Laura.
Thanks for letting us know.