[Bug 13044] Corruption and slowness when screen rotated 90 degrees left or right

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=13044





--- Comment #19 from Alex Deucher <agd5f at yahoo.com>  2008-05-14 10:19:36 PST ---
(In reply to comment #17)
> Thanks for the hints.
> xrandr --output DVI-0 --rotate left
> has a much more helpful error message (than displaying garbage).
> Setting up the proper virtual size then fixes the message and the display.
> 
> Multiple questions arise:
> -Where do I get information about the available outputs from? Have not had any
> luck using the query or verbose options to xrandr.

type xrandr and you can see what outputs your card has, which are connected,
and what modes are available on each output.  for example:
$ xrandr
Screen 0: minimum 320 x 200, current 2560 x 1024, maximum 2560 x 1024
VGA-0 disconnected (normal left inverted right x axis y axis)
S-video disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1280x1024+1280+0 (normal left inverted right x axis y axis)
376mm x 301mm
   1280x1024      60.0*+   75.0     60.0     60.0* 
   1600x1024      60.0  
   1280x960       60.0  
   1152x864       75.0     75.0  
   1024x768       75.1     75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     75.0     60.0     59.9  
   720x400        70.1  
DVI-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm
x 301mm
   1280x1024      60.0*+   75.0     60.0     60.0* 
   1600x1024      60.0  
   1280x960       60.0  
   1152x864       75.0     75.0  
   1024x768       75.1     75.0     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     75.0     60.0     59.9  
   720x400        70.1  

On this card DVI-0 and HDMI-0 are connected.  VGA-0 and S-video are not.

> -Why does xrandr fail silently if it receives an invalid output as a parameter?

patches welcome.

> -When can I get acceleration with rotation? ;-)

If you enable exa (Option "AccelMethod" "EXA") and use the ati driver from git
master, you can get accelerated rotation.


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