[Bug 91585] [BDW] System hard lock-up on resume from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91585

--- Comment #23 from Jerome <an.inbox at free.fr> ---
Created attachment 121007
  --> https://bugs.freedesktop.org/attachment.cgi?id=121007&action=edit
dmesg output after boot + suspend + resume

With the nightly kernel as described in comment #22, this the output of dmesg
after boot, suspend and resume with kernel option drm.debug=0x1e.

Resume fails:
  [  111.781637] [drm:intel_display_resume [i915]] *ERROR* Restoring old state
failed with -22

/sys/class/drm/card0/error contains no error ("no error state collected").

As described, after resume screen is black and VT switching doesn't work but
system is alive and can be logged into with SSH, and rebooted cleanly.

Let me know if you want to make other tests.

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