Public bug reported:
DRI is not working on my Toshiba Tecra S1 with a Mobility 9000 R250 i.e.
desktop is unbearably slow in gutsy. Feisty was fine both 2D and 3D.
Xorg.0.log reports that DRI is enabled, however glxinfo says that
indirect rendering is being used and nothing shows when I set the debug
variables. I also get kernel messages about mtrrs not being found when
xorg starts:
[ 2743.024000] mtrr: no MTRR for a8000000,2000000 found
[ 2745.508000] agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0.
[ 2745.508000] agpgart: Putting AGP V2 device at 0000:00:00.0 into 4x mode
[ 2745.508000] agpgart: Putting AGP V2 device at 0000:01:00.0 into 4x mode
[ 2746.812000] [drm] Setting GART location based on new memory map
[ 2746.812000] [drm] Loading R200 Microcode
[ 2746.812000] [drm] writeback test succeeded in 2 usecs
Is it possible that drm is trying to use the wrong mtrr?
a8000000,2000000 suggests it's looking for a 32MB mtrr at a8000000,
however:
$ cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1
reg01: base=0xb0000000 (2816MB), size= 64MB: write-combining, count=1
reg02: base=0xa8000000 (2688MB), size= 128MB: write-combining, count=2
I'd try and change the AGP aperture like it says in the ATI driver wiki
page, but the laptop bios doesn't have this option.
** Affects: xserver-xorg-driver-ati (Ubuntu)
Importance: Undecided
Status: New
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DRI not working on ATI RV250 (Radeon Mobility 9000) in gutsy
https://bugs.launchpad.net/bugs/161766
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