Relevant log entries below. I note that I have no /dev/dri directory. Created one, but it's gone on reboot. My 32-bit machine has these entries in dmesg, but the 64-bit machine does not: agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0. agpgart: Putting AGP V2 device at 0000:00:00.0 into 1x mode agpgart: Putting AGP V2 device at 0000:01:00.0 into 1x mode Hugh x86_64 dmesg: agpgart: Detected AMD 8151 AGP Bridge rev B3 agpgart: Maximum main memory to use for agp memory: 7956M agpgart: AGP aperture is 128M @ 0xf0000000 PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture Linux agpgart interface v0.100 (c) Dave Jones vesafb: probe of vesafb0 failed with error -6 Xorg.0.log: (II) Loading sub module "drm" (II) LoadModule: "drm" (II) Loading /usr/X11R6/lib64/modules/linux/libdrm.a (II) Module drm: vendor="X.Org Foundation" (II) MGA(0): [drm] bpp: 32 depth: 24 (II) MGA(0): [drm] Sarea 2200+664: 2864 drmOpenDevice: node name is /dev/dri/card0 drmOpenDevice: open result is -1, (Unknown error 999) drmOpenDevice: open result is -1, (Unknown error 999) drmOpenDevice: Open failed drmOpenDevice: node name is /dev/dri/card0 drmOpenDevice: open result is -1, (Unknown error 999) drmOpenDevice: open result is -1, (Unknown error 999) drmOpenDevice: Open failed [drm] failed to load kernel module "mga" (II) MGA(0): [drm] drmOpen failed (EE) MGA(0): [drm] DRIScreenInit failed. Disabling DRI. > Re: Slow X on x86_64 > > ______________________________________________________________________ > * From: Alan Cox <alan redhat com> > * To: Development discussions related to Fedora Core <fedora- > devel-list redhat com> > * Subject: Re: Slow X on x86_64 > * Date: Wed, 8 Dec 2004 18:21:54 -0500 > > ______________________________________________________________________ > On Wed, Dec 08, 2004 at 02:45:54PM -0800, Hugh Caley wrote: > > I'm having a problem with an install of FC3 on an Opteron machine. The > > X performance is deadly slow; glxgears gives me less than 53 FPS. On a > > similarly x86 32-bit machine I'm getting well over 500 FPS. It's the > > same with both a Matrox G550 and an ATI Radeon 9200 card. > > Maxtrox at least was 32bit only for DRI until very recently. Radeon should > be working. Mine does anyway 8) > > > Anyone else seeing this? > > Logs ? >