On Thu, Jul 18, 2002 at 06:30:42PM -0500, Markus Glodek wrote: > > > [ hint ] you have MTRR support but it's unused. > > > It seems like your X server didn't set any MTRR ranges for the > > > graphics card. Maybe upgrading your X server helps... > > > You don't have a PCI graphics card, do you? AFAIK, MTRR only > > > helps with AGP cards.
False. Using a write-combining MTRR helps performance on PCI as well as AGP. > > Are you sure you have MTRR support in your kernel? > > > > cat /var/log/messages | grep -i "mtrr" grep -i mtrr /var/log/messages. Useless Use of Cat award! > > gives me (Matrox gfx card): > > > > Jul 18 22:56:03 spookcentral kernel: mtrr: v1.40 (20010327) Richard Gooch > > ([EMAIL PROTECTED]) > > Jul 18 22:56:03 spookcentral kernel: mtrr: detected mtrr type: Intel > > Jul 18 22:56:03 spookcentral kernel: matroxfb: MTRR's turned on This line is only present because you have a Matrox card and are using the matroxfb module. Non-Matrox cards, or people who don't use matroxfb, won't see it. > Jul 18 10:04:58 philo kernel: mtrr: v1.40 (20010327) Richard Gooch > ([EMAIL PROTECTED]) > Jul 18 10:04:58 philo kernel: mtrr: detected mtrr type: AMD K6 > > Nothing about "MTRR's turned on". I thought that the mere presence of > /proc/mtrr (it's there) tells me that my kernel supports MTRR. Does it? > > What should I do? On startup, before X has ever run, do a "cat /proc/mtrr". You should see a single MTRR the size of your memory, like so: reg00: base=0x00000000 ( 0MB), size= 256MB: write-back, count=1 Then, start X. In an xterm, do "cat /proc/mtrr". You should see some more mtrr entries there. Here's mine: reg00: base=0x00000000 ( 0MB), size= 256MB: write-back, count=1 reg01: base=0xd4000000 (3392MB), size= 16MB: write-combining, count=1 reg05: base=0xd0000000 (3328MB), size= 64MB: write-combining, count=1 Those write-combining entries indicate that the framebuffer has been mapped. Additionally, you can look at the XFree86 log file, /var/log/XFree86.0.log. Search for MTRR. (Case insensitive, I suppose.) -andy _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
