[Intel-gfx] 3.11.0+ Laptop screen goes blank during kernelboot

[Jani Nikula]

On Tue, 10 Sep 2013, Jani Nikula <jani.nikula at linux.intel.com> wrote:
> Hi Hans -
>
> On Sat, 07 Sep 2013, Hans de Bruin <jmdebruin at xmsnet.nl> wrote:
>> Since a day or two the screen of my laptop goes blank when the kernel 
>> switches resolution in the boot process. Happily the x-server turns it 
>> on again.
>
> Please try the drm-intel-nighly branch of
> git://people.freedesktop.org/~danvet/drm-intel
>
> I suspect this might be a regression from upstream
> commit 045ac3b5629d9711531a408e92f9074db6afe7ce
> Author: Jesse Barnes <jbarnes at virtuousgeek.org>
> Date:   Tue May 14 17:08:26 2013 -0700
>
>     drm/i915: add encoder get_config function v5
>
> fixed by
> commit 775e18a9561725e07ea68ada82880013e7b70cb7
> Author: Imre Deak <imre.deak at intel.com>
> Date:   Tue Jul 30 13:36:32 2013 +0300
>
>     drm/i915: make user mode sync polarity setting explicit
>
> in drm-intel-nightly.
>
> The fix seems to apply cleanly on 3.11 too, could try that also.

Similar issue, different cure:
http://thread.gmane.org/gmane.linux.kernel/1557476


-- 
Jani Nikula, Intel Open Source Technology Center