Bug 2184048

Created attachment 1955630 [details]
kernel logs from rawhide kernel

Update: I can reproduce this 100% of the time, even with a manually triggered suspension. The computer being idle or not doesn't matter.

Created attachment 1955706 [details]
kernel logs from rawhide kernel after failed suspend

Update: The rawhide kernel is also failing to suspend, although not as often as the current F37 kernel. It shows the same symptoms. I'm sure it's the same bug. Will now try an older kernel version to pinpoint where this started.

Cannot reproduce problem on kernel 6.0.18-300.fc37.x86_64. The problem started in 6.1.

Created attachment 1974798 [details]
Boot which first succeeded to suspend and resume but subsequently failed to suspend

Attached logs of boot which first succeeded to suspend and resume but
subsequently failed to suspend. You can see the 'Filesystems sync' log message
is only present for the first suspend but not for the subsequent one, which
might be relevant.

I experience the same issue, although it doesn't happen always, it appears to
be random in my case.

1. Please describe the problem:

   The system doesn't properly suspend and hangs whilst keeping the case fan
   and power LED on (HDDs are shut down). Only a hard power off and a boot from
   scratch is possible when it hangs during suspend.

2. What is the Version-Release number of the kernel:

   6.3.8-100.fc37.x86_64

3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

   Haven't tried older kernels to see at what point this issue started
   happening but it certainly only started happening in the last year or so.
   I've had this Fedora installation for 5+ years.

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:

   Yes, but it cannot be reproduced reliably in my case. It only happens
   sometimes (about 50% of the time).

   1. Simply attempt to suspend the system.

5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:

   Did not try.

6. Are you running any modules that not shipped with directly Fedora's kernel?:

   No.

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.

   Attached logs of boot which first succeeded to suspend and resume but
   subsequently failed to suspend. You can see the 'Filesystems sync' log
   message is only present for the first suspend but not for the subsequent
   one, which might be relevant.

(In reply to Vojtech Sobota from comment #6)
> I experience the same issue, although it doesn't happen always, it appears to
> be random in my case.
> 
> 1. Please describe the problem:
> 
>    The system doesn't properly suspend and hangs whilst keeping the case fan
>    and power LED on (HDDs are shut down). Only a hard power off and a boot
> from
>    scratch is possible when it hangs during suspend.
> 
> 2. What is the Version-Release number of the kernel:
> 
>    6.3.8-100.fc37.x86_64
> 
> 3. Did it work previously in Fedora? If so, what kernel version did the issue
>    *first* appear?  Old kernels are available for download at
>    https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :
> 
>    Haven't tried older kernels to see at what point this issue started
>    happening but it certainly only started happening in the last year or so.
>    I've had this Fedora installation for 5+ years.
> 
> 4. Can you reproduce this issue? If so, please provide the steps to reproduce
>    the issue below:
> 
>    Yes, but it cannot be reproduced reliably in my case. It only happens
>    sometimes (about 50% of the time).
> 
>    1. Simply attempt to suspend the system.
> 
> 5. Does this problem occur with the latest Rawhide kernel? To install the
>    Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
>    ``sudo dnf update --enablerepo=rawhide kernel``:
> 
>    Did not try.
> 
> 6. Are you running any modules that not shipped with directly Fedora's
> kernel?:
> 
>    No.
> 
> 7. Please attach the kernel logs. You can get the complete kernel log
>    for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
>    issue occurred on a previous boot, use the journalctl ``-b`` flag.
> 
>    Attached logs of boot which first succeeded to suspend and resume but
>    subsequently failed to suspend. You can see the 'Filesystems sync' log
>    message is only present for the first suspend but not for the subsequent
>    one, which might be relevant.


Sorry, I don't know why I said I can reproduce it 100% of the time. It is as you said, more like 50% of the time. I can usually suspend successfully 2 times before a failure occurs. It's totally random.

I encourage you to test kernel 6.0. From my tests, it doesn't have this problem, but 6.1 does. We need attention from the maintainers to proceed. They will probably ask us to perform a bisect to locate the exact version the bug is introduced.

I have been able to reproduce this on shutdown as well, although not as often as on suspension. In this case the system doesn't completely shutdown, and some fans and LEDs remain on. A forced power off is needed to recover from this.

I can confirm the issue disappears when I use kernel 6.0.

Happy to help with bisecting and/or testing.