linux-kernel - Re: [PATCH] drm/radeon: Fix regression with suspend/resume

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Message-ID: <1423886115.5037.12.camel@theros.lm.intel.com>
Date:	Fri, 13 Feb 2015 20:55:15 -0700
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	Michel Dänzer <michel@...nzer.net>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Alex Deucher <alexander.deucher@....com>,
	Dave Airlie <airlied@...hat.com>, Lauri Kasanen <cand@....com>,
	Christian König <christian.koenig@....com>
Subject: Re: [PATCH] drm/radeon: Fix regression with suspend/resume

On Fri, 2015-02-13 at 11:41 +0900, Michel Dänzer wrote:
> On 13.02.2015 05:30, Ross Zwisler wrote:
> > This patch reverts the changes made in this commit:
> > 
> >   deadcb36f49b ("drm/radeon: Use two-ended allocation by size, v2")
> > 
> > That patch caused a regression on my system where the bottom of the
> > screen flickers after my laptop goes thorough a suspend and resume.
> 
> What kind of flicker is it? E.g. does it only affect X or also console,
> does it flicker all the time or only when there is activity, what does
> it look like, ...

It's kind of hard to describe it precisely, so I made a video.  :)

http://youtu.be/ESm9SMnr0do

It only affects X, not the console, and it seems to go away if you log
out back to the login manager (I'm using GDM on Fedora 20) and back into
your window manager.

I've tested with OpenBox, Gnome and KDE, and it happens in all three, so
it doesn't appear to be related to the window manager.

It does appear to flicker more if you move the mouse, but it still does
flicker occasionally if you aren't doing anything.

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