I've recently installed the 32bit version of Fedora 12 on my Toshiba notebook, running a ATI HD 3650 Mobility graphics card. Upon installing mesa-dri-drivers-experimental.i686, "Desktop effects" still complains about "Accelerated 3D graphics not available".
There seems to be a problem with the module r600_dri.so, Xorg.0.log states
(EE) AIGLX error: dlopen of /usr/lib/dri/r600_dri.so failed (/usr/lib/dri/r600_dri.so: undefined symbol: _mesa_texformat_luminance_float16)
So even though it installed the experimental r600_dri.so drivers, it fails to properly load them. I was wondering if anyone else has experienced something similar. The curious thing is that during a previous installation using the 64bit version, I had no problems enabling the experimental drivers.
Any help would be greatly appreciated.