Bug 5319
Summary: | Overlapping mtrr regions | ||
---|---|---|---|
Product: | Platform Specific/Hardware | Reporter: | Erik Andr (erik.andren) |
Component: | i386 | Assignee: | platform_i386 |
Status: | CLOSED CODE_FIX | ||
Severity: | normal | CC: | bunk |
Priority: | P2 | ||
Hardware: | i386 | ||
OS: | Linux | ||
Kernel Version: | 2.6.15-rc2 | Subsystem: | |
Regression: | Yes | Bisected commit-id: |
Description
Erik Andr
2005-09-27 11:44:01 UTC
I believe this is related to a problem I'm having with the nvidia drivers and the 2.6.14-rc2-mm series. (Tried both 2.6.14-rc2-mm1 and mm2). Here are the relevant lines from dmesg: NVRM: loading NVIDIA Linux x86 NVIDIA Kernel Module 1.0-7676 Fri Jul 29 12:58:54 PDT 2005 NVRM: PAT index 2 already configured for Write-Combining! NVRM: Aborting, due to PAT already being configured And /proc/mtrr: reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1 reg02: base=0xe0000000 (3584MB), size= 128MB: write-combining, count=1 By contrast, here's the /proc/mtrr from 2.6.14-rc1-mm1, which works fine: reg00: base=0x00000000 ( 0MB), size=984064MB: write-back, count=1 Strangely enough, the -rc2 version looks to be the correct one, but doesn't work (X fails to initialize). Gentoo, Pentium 4 2.8Ghz, 1024MB DDR, SMT enabled. If this problem seems to be unrelated to this bug, let me know and I'll open a separate one. They are problably unrelated as I don't have any nvidiahardware in my machine. Hi! I got the same issue now. I updated from 2.6.13.4 to 2.6.14 this morning. I have a radeon 9250 and use the opensource xorg/kernel driver combination. Oct 28 09:46:12 section_eight mtrr: 0xd0000000,0x10000000 overlaps existing 0xd0000000,0x8000000 Oct 28 09:46:12 section_eight mtrr: 0xd0000000,0x10000000 overlaps existing 0xd0000000,0x8000000 Oct 28 09:46:12 section_eight mtrr: 0xd0000000,0x10000000 overlaps existing 0xd0000000,0x8000000 Oct 28 09:46:12 section_eight agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0. Oct 28 09:46:12 section_eight agpgart: reserved bits set in mode 0x1f00420f. Fixed. Oct 28 09:46:12 section_eight agpgart: X tried to set rate=x12. Setting to AGP3 x8 mode. This is on a nforce2 shuttle an35n mobo with a sempron socket 462 (A) 2400+. Cheers Sebastian /proc/mtrr: reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1 reg01: base=0xe0000000 (3584MB), size= 32MB: write-combining, count=2 reg02: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=2 The 128MB is the cards RAM, the 32MB is the Aperture Size in my BIOS and the 512MB is presumably my main RAM. Downstream bug report: http://bugs.gentoo.org/112238 Trying out 2.6.14.3 resolved this issue for me. Should the bug be closed or are others still affected? In the Gentoo bug, Sebastian reproduced the problem on 2.6.15-rc2 Strike my last comment. I only get this error with post 6.8.2 of the X.org server. Nowadays I'm using Ubuntu Edgy with Xorg 7.1.1 on the same machine, still experiencing the same bug. Sebastian's issue is solved on newer kernels (2.6.20 is fixed). This is not an issue any more using Ubuntu Gutsy (2.6.22) |