radeon driver does not allow for direct rendering. Xorg.0.log: (II) RADEON(0): AGP card detected (II) RADEON(0): Direct rendering unstable on RV100, disabling (II) RADEON(0): Detected total video RAM=16384K, accessible=65536K (PCI BAR=131072K) (--) RADEON(0): Mapped VideoRAM: 16384 kByte (32 bit DDR SDRAM) (II) RADEON(0): Color tiling enabled by default There is no documented way to enable it anyway. It did work with FC5. Do I miss anything ?
DRI is disabled for all RV100 cards as per bug #197992. The M6 may or may not actually be an RV100, but the code treats it as such, so. We have a request in to ATI to clarify the core version of the M6; until then, expect it not to work.
M6 really is an RV100, so this is expected behaviour. *** This bug has been marked as a duplicate of 197992 ***