[Bug 105196] Display hangs after resuming from hibernation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105196

--- Comment #14 from Imre Deak <imre.deak at intel.com> ---
Created attachment 137791
  --> https://bugs.freedesktop.org/attachment.cgi?id=137791&action=edit
Fix hibernation with S0 target state

> Created attachment 137788 [details]
> dmesg custom 4.15 w/dmc 1.27

There's the following:
[   64.041878] Unexpected DBuf power power state (0x0000000a)

during resuming. One possibility is that hibernation happens with an S0 ACPI
target state (or at least target state < S3) and because of that we won't
reinit power domains during resume. That's a failed attempt on my part to fix
this issue in an earlier patch. Could you try the attached fix on top of 4.15.6
to try it again (and attach a log)?

In the log there is also the
[   69.146901] [drm:skl_check_plane_surface [i915]] requested Y/RGB source size
7680x4320 too big (limit 8192x4096)

error, that one looks like user space asking for an invalid config and
unrelated to the above.

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