phenomenally slow performance dragging windows around (was: xrandr: adding a second display to screen 0 [radeon])

[Michel Dänzer]

On Tue, 2008-02-19 at 15:59 +0100, martin f krafft wrote:
> 
> With IceWM, window dragging performance is also sluggish. With
> FVWM2, I cannot notice any problems. I've been using fluxbox for
> *years* and have never seen something like this. I have seen
> temporary sluggishness when the system was loaded and I moved
> a window across old-style xinerama screens, but never within
> a single screen. Note that it makes no difference whether I drag the
> window around on a single screen, or across xrandr-style xinerama
> heads.

[...]

> Section "Device"
>           Identifier      "Radeon 9200"
>     Driver          "ati"
>     BusID           "PCI:1:0:0"
>     Option          "AccelMethod"   "EXA"
>     Option          "Monitor-DVI-0" "Acer AL922[1]"
>     Option          "Monitor-VGA-0" "MRM B18XA"
> EndSection
> 
> Section "Screen"
>     Identifier      "Default Screen"
>     Device          "Radeon 9200"
>     DefaultDepth    24
>     SubSection "Display"
>         Depth       24
>         Virtual     2560 1024
>     EndSubSection
> EndSection

I guess it doesn't happen if you use XAA or if you limit the virtual
size to within 2048 in both directions?


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer