Problem solved. I checked the BIOS and found the setting "AGP Aperture Size" which was set to 256 MB. Manually setting the undocumented "GARTSize" parameter to match this (256) causes DRI to initalize correctly!
All error messages are gone, except for the "mtrr: no MTRR for e0000000,4000000 found" one. Seems that the Radeon driver (or is it the AGP driver?) fails to correctly detect the AGP Aperture Size and needs to be fed it manually. :-D. Now AIGLX is failing with: (WW) AIGLX: 3D driver claims to not support visual 0x23 (WW) AIGLX: 3D driver claims to not support visual 0x24 (WW) AIGLX: 3D driver claims to not support visual 0x25 (WW) AIGLX: 3D driver claims to not support visual 0x26 (WW) AIGLX: 3D driver claims to not support visual 0x27 (WW) AIGLX: 3D driver claims to not support visual 0x28 (WW) AIGLX: 3D driver claims to not support visual 0x29 (WW) AIGLX: 3D driver claims to not support visual 0x2a (WW) AIGLX: 3D driver claims to not support visual 0x2b (WW) AIGLX: 3D driver claims to not support visual 0x2c (WW) AIGLX: 3D driver claims to not support visual 0x2d (WW) AIGLX: 3D driver claims to not support visual 0x2e (WW) AIGLX: 3D driver claims to not support visual 0x2f (WW) AIGLX: 3D driver claims to not support visual 0x30 (WW) AIGLX: 3D driver claims to not support visual 0x31 (WW) AIGLX: 3D driver claims to not support visual 0x32 (II) AIGLX: Loaded and initialized /usr/lib/dri/r200_dri.so (II) GLX: Initialized DRI GL provider for screen 0 But that's another issue entirely... Please close this issue as "worked around with an undocumented xorg.conf hack" or something like that :-). -- ATI Radeon 8500 unworkable 3D - "RADEON(0): [agp] AGP failed to initialize. Disabling the DRI." https://bugs.launchpad.net/bugs/126808 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
