Created attachment 40843 [details] [review] Xorg.0.log I cannot seem to get acceleration on my dual-head setup. I have no xorg.conf files other than those that come standard with Fedora 14. It may be that my card doesn't support dri with dual monitors of this size, but I'm not hardware savy enough to know.
Created attachment 40844 [details] Output from xrandr -q AIGLX: Screen 0 is not DRI2 capable xorg-x11-server-Xorg-1.9.1-3.fc14.x86_64 xorg-x11-drv-ati-6.13.1-0.3.20100705git37b348059.fc14.x86_64
The driver supports dualhead and 3D just fine. Is your user in the video group?
Alex, My userid was not a member of the video group, so, I have added both my userid and root to the video group. I restarted Xorg and there is no apparent difference in behavior.
Ok, acceleration is disabled: [ 47.918] (II) RADEON(0): GPU accel disabled or not working, using shadowfb for KMS That's the problem. Check your dmesg output to see why.
Created attachment 40873 [details] [review] dmesg output Alex, This may be my problem, but I can't find how to enable the IOMMU in my computer's BIOS setup screen. Do I find that option on my motherboard's BIOS or in the Video card's BIOS? Sorry to be such a hardware dunderhead. Thanks for helping. John
You need a newer kernel (2.6.36), ddx (xf86-video-ati from git master) and mesa (7.9 or git master) to use acceleration on evergreen cards.
That did the trick. Thank you so much for your help and patience.
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