How to get an pm2 accelerated X server for Debian?
get the XF68_FBDev_pm2_4 or later file from http://dpt-info.u-strasbg.fr/~luther/xfree/ and copy it to your /usr/X11R6/bin directory. Check the readme files on the web site to see what each of those XF68_FBdev_pm2 files contain. Then you need to edit /etc/X11/Xserver, and change the first line to be the absolute path to the Xserver (should be /usr/X11R6/bin/XF68_FBDev_pm2_4 in our case, but you can put it anywhere you want, or rename it to your liking). There are various Xserver in the above dir, some contains GC acceleration, very fast but still some graphical problems, other have GC acceleration disabled. It is up to you to choose which one you want. Read the readme file to check. Notice : this patch will be in the nect release of Xfree 3.3.4, so you will not need to do this then.