Bug 16111

Created attachment 16757 [details] [review]
Xorg.log failing

This is probably clone support (driving multiple outputs with one crtc) which was added recently.  Can you attach the output of 'xrandr --verbose'?

The following should work:
xrandr --output DVI-1 --right-of DVI-0 --crtc 1

Ideally the xserver would be smart enough to handle this...

Created attachment 16765 [details] [review]
xrandr --verbose

(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'?

Sure, done.

> The following should work:
> xrandr --output DVI-1 --right-of DVI-0 --crtc 1

It doesn't :(
The DVI-0 becomes black and go into sleep mode, if I do xrandr, I get this :

% xrandr
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 3840 x 1200
DVI-1 connected (normal left inverted right x axis y axis)
   1920x1200      60.0 +   59.9  
   1600x1200      59.9  
   1680x1050      60.0  
   1600x1000      59.9  
   1280x1024      84.8     75.0     59.9  
   1280x960       59.9  
   1152x864       75.0  
   1152x720       60.0  
   1024x768       75.1     60.0  
   832x624        74.6  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
DVI-0 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm
   1920x1200      60.0*+   59.9  
   1600x1200      59.9  
   1680x1050      60.0  
   1600x1000      59.9  
   1280x1024      84.8     75.0     59.9  
   1280x960       59.9  
   1152x864       75.0  
   1152x720       60.0  
   1024x768       75.1     60.0  
   832x624        74.6  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  

Thank you!

Try the following:
xrandr --output DVI-1 --mode 1920x1200 --crtc 1
xrandr --output DVI-1 --right-of DVI-0

Created attachment 16778 [details]
Xorg.log with logverbose 7

(In reply to comment #5)
> Try the following:
> xrandr --output DVI-1 --mode 1920x1200 --crtc 1
> xrandr --output DVI-1 --right-of DVI-0

One screen becomes black, the other (DVI-1) is correct. I'm attaching to this
bug the Xorg.0.log with -logverbose 7

It seems that I'm not alone to have this problem :
http://article.gmane.org/gmane.comp.freedesktop.xorg.drivers.radeonhd/3556

Thanks

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.

(In reply to comment #8)
> You also have to use at least xrandr version 1.2.3. Former versions were very
> buggy WRT uncloning.

I tried xrandr using git/master  (4dcc8ae1a6903434def1a2706f7c68ff9e2a17c4) and same thing :(

(In reply to comment #8)
> 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.

Maybe an issue with 1.4.x xservers?  Works fine here with xserver from git.

if this is still an issue with ati 6.12.4 or git master, please re-open.

closing due to lack of feedback.