[Bug 103277] [bisected] Systems hangs on resume from S3 sleep due to "Match actual state during S3 resume" commit

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Comment # 2 on bug 103277 from
(In reply to dwagner from comment #0)
> After I updated my kernel to
> https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next as of
> today (latest commit at this time: 
> 1c630e83443a0f271c192ecfa0d94023661a0000) I noticed that my computer would
> no longer wake up from S3 sleep - power LED goes on, but apart from that no
> display and no reaction to any input (other than Num-Lock still switchable).
> 
> The difference to the ~2 weeks older kernel was 100% reproducable by just
> doing:
> 
> - boot to console (no start of X11 required) and login as root
> - echo "mem" >/sys/power/state
> - wait till power LED blinks
> - press some key to wake up the system
> - observe no display output and no reaction to anything
> 
> GPU is a RX 460, CPU a Ryzen R7 1800X, board Asus X370 Pro, connected is one
> 4k display via HDMI 2.0.
> 
> I bisected the git commits, and the one that causes the bug is:
> 
> >  7ae4acd21e9e264afb079e23d43bcf2238c7dbea
> >  drm/amd/display: Match actual state during S3 resume.
> 
> After this, I went back to the current HEAD of amd-staging-drm-next and
> (manually) reverted only commit 7ae4acd21e9e264afb079e23d43bcf2238c7dbea,
> and this indeed results in a kernel that works fine with regards to resuming
> from S3 sleep.
> 
> There are no noteworthy "dmesg"-emissions that accompany going to S3 sleep,
> but the dmesg-output that I can collect ends slightly before the system
> actually sleeps, so wether anything is emitted upon the wake-up attempt, I
> have no way to know.

Thanks, we can reproduce this too, should have something shortly.


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