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Avatar1983
n00b
Joined: 22 Apr 2004
Posts: 21
Location: Sheffield, UK
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 Posted: Sat May 22, 2004 3:57 pm Post subject: Nvidia AGP problem |
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I have a Asus A7V8X-X mainboard with a VIA KT400 chipset. This supports up to agp 8x. My graphics card is a MSI GeForce 4200 Ti, which supports agp 4x.
I have the following problem. The card is put in to 2x mode when X starts. This is the snippet of the X log:
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II) NVIDIA(0): AGP 2X successfully initialized
(II) NVIDIA(0): Setting mode "1280x1024"
(II) Loading extension NV-GLX
(II) NVIDIA(0): NVIDIA 3D Acceleration Architecture Initialized
(II) NVIDIA(0): Using the NVIDIA 2D acceleration architecture
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Upon further investigation, I discovered the following.
Output of cat /proc/drivers/nvidia/agp/card:
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Fast Writes: Supported
SBA: Supported
AGP Rates: 4x 2x 1x
Registers: 0x1f000217:0x1f000312
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Which is as it should be. But: cat /proc/drivers/nvidia/agp/host-bridge:
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Host Bridge: VIA Technologies, Inc. VT8377 [KT400 AGP] Host Bridge
Fast Writes: Supported
SBA: Supported
AGP Rates: 2x 1x
Registers: 0x1f000a13:0x00000312
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The reported agp rates here are clearly wrong. I should report up to 8x. For completeness sake, here is cat /proc/drivers/nvidia/agp/status:
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Status: Enabled
Driver: AGPGART
AGP Rate: 2x
Fast Writes: Enabled
SBA: Enabled
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I'm using agpgart, so I tried switching to NvAgp, but that causes my system to freeze after a few minutes. And yes, agpgart was not in the kernel when I tried NvAgp. This is the output of dmesg | grep agpgart:
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Linux agpgart interface v0.100 (c) Dave Jones
agpgart: Detected VIA KT400/KT400A/KT600 chipset
agpgart: Maximum main memory to use for agp memory: 439M
agpgart: AGP aperture is 128M @ 0xf0000000
agpgart: Found an AGP 3.5 compliant device at 0000:00:00.0.
agpgart: Device is in legacy mode, falling back to 2.x
agpgart: Putting AGP V2 device at 0000:00:00.0 into 2x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 2x mode
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I suspect that the line Device is in legacy mode, falling back to 2.x is somehow indicative of the problem, but I don't know what to do about it.
This happens with 2.6.5 vanilla, 2.6.6 vanilla and 2.6.6-love4.
Any help would be greatly appreciated! |
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patsonrt1
Tux's lil' helper
Joined: 21 Mar 2003
Posts: 104
Location: Somewhere in my head
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| Posted: Sat May 22, 2004 4:05 pm Post subject: |
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Have you checked the Bios setup?
Sorry buts thats all I got 
_________________
"Well fine, go ahead and miss church, and when you die and go to hell you can answer to SATAN!"
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-fortune |
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Avatar1983
n00b
Joined: 22 Apr 2004
Posts: 21
Location: Sheffield, UK
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| Posted: Sat May 22, 2004 4:32 pm Post subject: |
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| patsonrt1 wrote: | Have you checked the Bios setup?
Sorry buts thats all I got |
Yes, I have. AGP is set to 4x in bios, fast writes and side band addresing enabled. |
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