[Bug 94825] LVDS blank screen on GM45

[bugzilla-daemon at freedesktop.org]

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

--- Comment #31 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Rob Kramer from comment #30)
> Created attachment 126271 [details]
> dmesg with override bit patch
> 
> I've added a dmesg dump of kernel 4.7.2 with two of your patches
> (backported):
> 
>   drm/i915: Debug GBDA get panel details
>   drm/i915: Ignore OpRegion panel type unless the "override" bit is set 
> 
> The result is that my screen doesn't switch on anymore. I've tested with
> vanilla 4.7.2 as well, and that works OK.
> 
> Is the output OK for you? If you want me to test further patches, no problem.

[    4.988023] [drm:swsci] GBDA get panel details 0x00000020 0x00021000
[    4.988026] [drm:intel_opregion_get_panel_type] No OpRegion panel type
override

Argh. So the override bit won't help us :(

I have no good ideas how to make this truly automagic, so I think we need a
quirk of some sort for your machine. Can you provide the output of 
'lspci -vnn -s 0:2.0' and 'dmidecode' ?

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160907/cdba65c7/attachment.html>