Bug#495267: Upstream commit which causes this

[Florian Weimer]

* Michel Dänzer:

> On Sat, 2008-08-16 at 09:33 +0200, Florian Weimer wrote:
>> tag 495267 upstream
>> thanks
>> 
>> Upstream HEAD is still affected.
>> 
>> commit 55e4469f59c82bb5762673de5f3f27d18b0bd9a3
>> Author: Alex Deucher <alex at botch2.com>
>> Date:   Tue May 20 17:46:58 2008 -0400
>> 
>>     RADEON: enable cloning on multi-crtc cards
>
> I suspect this is a case of the xrandr utility not being smart enough to
> automatically select different CRTCs for the outputs. Try choosing them
> explicitly with --crtc.

Doesn't seem to work, either.  If I use --crtc, one of the screens just
stays dark.