linux-kernel - Re: [bisect result] Re: 3.15-rc2: i915 regression: only top 20% of screen works in X

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Message-ID: <20140424220024.GA27250@atrey.karlin.mff.cuni.cz>
Date:	Fri, 25 Apr 2014 00:00:24 +0200
From:	Pavel Machek <pavel@....cz>
To:	Chris Wilson <chris@...is-wilson.co.uk>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	kernel list <linux-kernel@...r.kernel.org>,
	Jiri Kosina <jikos@...os.cz>
Subject: Re: [bisect result] Re: 3.15-rc2: i915 regression: only top 20% of
 screen works in X

Hi!

> > > And if you can indeed reliably reproduce this a bisect could be really useful.
> > 
> > And we have a winner here :-)
> > 
> > Ok, it was not as painfull as I feared.
> > 
> > It does not revert cleanly, but doing it by hand was not that bad.
> 
> Oh my. That is bizarre, can you check whether you have

> commit 9991ae787a0c87fe7c783b4b6f4754c3cdbb6213
> Author: Chris Wilson <chris@...is-wilson.co.uk>
> Date:   Wed Apr 2 16:36:07 2014 +0100
> 
>     drm/i915: Move all ring resets before setting the HWS page
> 
> in your latest kernel? That just makes

No, I don't have that one.

> To confirm, on drm-intel-nightly you used a patch like:

I did not use drm-intel-nightly, but 3.15-rc2, because
drm-intel-nightly did not work at all. (Netconsole is not that easy to
set up, and I'd prefer not debugging 2 problems at the same time.)

Let me check with my patch reverted and 9991ae applied.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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