[Bug 73567] [915 Haswell ULT Asus UX302LA/LG] eDP bpp clamping results in blank screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73567

--- Comment #24 from Alberto Aguirre <albaguirre at gmail.com> ---
(In reply to comment #22)
> (In reply to comment #21)
> > I just noticed the latest drm-intel-nightly (commit
> > f27f16540be56813df2ebb8e1106dd5c258f07c3) has fixed the issue.
> > 
> > After bisecting, it seems the blank screen issues I was getting after
> > modesetting or suspend/resume have been fixed starting from commit:
> > 
> > commit b2f19d1a1d7b262cf5fbe6033776afcf6d1ab526
> > Author: Paulo Zanoni <paulo.r.zanoni at intel.com>
> > Date:   Thu Dec 19 14:29:44 2013 -0200
> > 
> >     drm/i915: set the backlight panel delays registers to 1
> 
> I'm slightly surprised by this outcome. Alberto, would it be too much
> trouble to double check with the commit before that, and then with that
> commit, to make sure it's this commit that really fixes the issue for you.
> Thanks.

I just double checked again and yes with the commit before
b2f19d1a1d7b262cf5fbe6033776afcf6d1ab526 - i.e this one:

commit 412b61d83a2d3e74527633097820db7510f97ce1
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Jan 17 15:59:39 2014 +0200

    drm/i915: Fix new_config and new_enabled for load detect


suspend/resume and modesetting result in a black screen. 

Using b2f19d1a1d7b262cf5fbe6033776afcf6d1ab526 there are no blank screen issues
in my machine at least.

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