[Bug 94825] LVDS blank screen on GM45

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94825

--- Comment #36 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Rob Kramer from comment #35)
> Created attachment 126361 [details]
> dmesg with quirk patch
> 
> OK, I added
> 
>   drm/i915: Ignore OpRegion panel type except on select machines
> 
> on top of 4.7.2 vanilla (minor hack required). I didn't apply the other two
> patches in your branch, since they looked irrelevant.
> 
> Result is no screen.. In the new dmesg I added, it looks like the quirk is
> detected too late in the process, so it is as if no quirk is present when it
> is needed, and the wrong panel type is picked.
> 
> At least the quirk itself works well! :)

Doh. Let's try that again. Assuming I didn't fumble anything else this should
do the trick:

git://github.com/vsyrjala/linux.git opregion_panel_type_quirk_2

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