[Bug 96442] Hibernating while utilising i915 with modeset=1 results in crash.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96442

Jani Nikula <jani.nikula at intel.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #3 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Volker Gronau from comment #0)
> Created attachment 124405 [details]
> ZIP files containing screenshots and dmesg of system startup

For future reference, please attach each file directly, unpacked.

> Very seldom the display comes up after this and a kernel message could be
> seen. I took a screenshot (literally) because you cannot write to the hard
> disk anymore. Whatever you do causes the system to fully die. 

Unfortunately, the screenshots do not contain the full backtrace. :(

> Sadly I saw the instruction for posting bug reports utilising drm.debug=0x1e
> too late. As I already mentioned it is a rarity to capture a kernel panic at
> all but I try to catch one with this mode set.

Please attach such a dmesg running drm-intel-nightly over a hibernate-resume
sequence even if it doesn't result in a crash; it may provide valueable
information anyway.

> (If somebody in the future experiences the same problem and it was never
> fixed with this https://github.com/vjay82/Linux-i915-Backlight-Control you
> can at least control the backlight but anyway you will loose acceleration.)

I can't recommend anyone using intel_reg for anything except testing and
debugging.

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