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8.42.3, debian sid and compiz fusion: massive performance problems
check the output of 'glxinfo' please and see if 'GLX_EXT_texture_from_pixmap' is listed under 'GLX extensions'. If it is not there you have no hardware acceleration by the gpu and everything is processed by the cpu hence the high cpu load and slow effects. I experience the same problems... -> http://www.phoronix.com/forums/showthread.php?t=6143
Somehow my posting disappeared... ok, again. I have the same problem. The reason for the poor performance is that indirect rendering is used. Direct rendering with AIGLX seems not to be supported by the current version 8.42.3 ('GLX_EXT_texture_from_pixmap' is missing in the 'GLX extensions' section of the output of 'glxinfo'.
I wasn't able to make the DRI work with the free ati/radeon driver under xorg 7.3 (but it works with fglrx). I think the driver is buggy, unless you have a tip for me? What do you mean with "the overriding option for the external monitor"? I've never heard about it.
This is my xorg.conf, which used to work under xorg 7.2 (please let me know if it's deprecated):
are you sure your driver's name is ati?
AFAIK, the name of the free driver is "radeon" and the binary-driver is named fglrx...
Yeah, according to man it works.
Originally posted by man ati
ati is an Xorg wrapper driver for ATI video cards. It autodetects whether your hardware has a Radeon, Rage 128, or Mach64 or earlier class of chipset, and loads the radeon(4), r128(4), or atimisc driver as appropriate.