I'm trying to make 3d acceleration work on my machine.
However, if I enable "Desktop Effects" in KDE's System Settings I get the following error:
"Failed to activate desktops effects using the given configuration options.."
I have unchecked all effects in the "All Effects" tab.
Compositing type is "OpenGL" in the "Advanced" tab.

card : ATI Mobility X1400
driver : xf86-video-ati 6.12.99.git20091014-1
xorg : xorg-server 1.7.1.902-1
desktop : kdemod-4.3.3 WITHOUT xorg.conf
kernel : 2.6.31-ARCH with KMS enabled

Code: Select all

glxinfo | grep -i opengl
OpenGL vendor string: DRI R300 Project
OpenGL renderer string: Mesa DRI R300 (RV515 7145) 20090101  TCL DRI2
OpenGL version string: 1.5 Mesa 7.6
OpenGL extensions:

I have disabled/enabled KMS and used a minimal xorg.conf to no avail.
Everytime I "Resume Compositing" I get the message "Compositing has been suspended by another application.
You can resume using the ALT+SHIFT+F12 shortcut".
That does not work either....

I just wish I knew what the "another application" is.
Maybe one can pipe it's stderr output to....?

Is this on a desktop or a laptop, since Powerdevil may have requested that effects be deactivated to save power.

Yes, it's a t-60 laptop, but in a docking-station with the "performance" power-profile active.

KMS and DRI2 are still unstable, i dont know why arch devs decided to use them by default. The only suggestion i can give you right now is to downgrade xorg, follow the instructions:
http://www.chakra-project.org/bbs/viewtopic.php?id=1829