intel driver gets slow as soon as I rotate on a 1920x1200 display

Keith Packard keithp at
Sat Jul 21 09:50:11 PDT 2007

On Sat, 2007-07-21 at 15:37 +0200, Thomas Glanzmann wrote:
> Hello,
> I just checked out Xorg from git and compiled it on Debian Etch. I have
> a EIZO S2431W with a resolution of 1920x1200 attached to a Mac Mini with
> a Intel 945GM[1]. As soon as I call "xrandr -o 1" I loose all my
> accerlation. I can literally watch how the "ls -al" output of a full
> screen xterm scrolles up. It takes several seconds to complete.  My
> /etc/X11/xorg.conf is at [2] and my Xorg.log.0 at [3]. Has anyone a idea
> what I did wrong or what I can do to improve the behaviour? Did I use
> the right intel driver?

Yeah, but you may have caught a version that broke acceleration for a
rotated screen. It's worth a try to switch to EXA acceleration to see if
this fixes it.

Section "Device"
   option "AccelMethod" "EXA"

keith.packard at
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