[Bug 89727] [SKL bisected] system hang when changing resolution in games or killing gnome-session twice

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89727

--- Comment #14 from Matt Roper <matthew.d.roper at intel.com> ---
(In reply to Daniel Vetter from comment #12)
> Can we just revert the skl part of this patch as an interim solution to
> unblock QA? Matt, can you please prepare a patch.

Reverting the SKL part of my patch will just result in NULL-dereference and
immediate crashes when killing X or doing anything else that causes the primary
plane to be disabled, so I think that will be even more crippling than the
current situation (at least today it sounds like you can bring X down and back
up at least once before running into problems).

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