[Bug 16111] [FireGL 5600] Regression with dual screens

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16111


Matthias Hopf <mhopf at suse.de> changed:

           What    |Removed                     |Added
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                 CC|                            |mhopf at suse.de




--- Comment #8 from Matthias Hopf <mhopf at suse.de>  2008-05-28 05:03:08 PST ---
Looks like a general RandR bug in newer Xservers(In reply to comment #2)
> This is probably clone support (driving multiple outputs with one crtc) which
> was added recently.  Can you attach the output of 'xrandr --verbose'?

The logfile posted to the radeonhd list (the radeonhd driver has the same
issue) showed that two different CRTCs were attached to the two outputs.
radeonhd always had clone support, so this is not related to the driver.

It seems there is a general RandR regression in newer Xservers. I don't think I
have tried this kind of setup with 1.4.90 or later recently.

> The following should work:
> xrandr --output DVI-1 --right-of DVI-0 --crtc 1
> 
> Ideally the xserver would be smart enough to handle this...

You also have to use at least xrandr version 1.2.3. Former versions were very
buggy WRT uncloning.


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