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Old 04-11-06, 09:12 AM   #1
89TROOPER
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Default 1-0-8756 - No /proc/driver/nvidia/agp?

According to the readme, I should have this in /proc. I'm trying to confirm that I'm using NvAgp and not AGPGART (registry says NvAgp=1...). Should I have the agp directory?
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Old 04-11-06, 09:48 AM   #2
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

$ ls /proc/driver/nvidia/agp/
card host-bridge status

$ cat /proc/driver/nvidia/agp/status
Status: Enabled
Driver: AGPGART

dunno how it is with nvagp, but assume Driver should be set to it...
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Old 04-11-06, 09:54 AM   #3
zander
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

@89TROOPER: this directory only exists if you have an AGP GPU.
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Old 04-11-06, 03:51 PM   #4
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

... what if I have a PCI Express card (Geforce 6200TC)? Does the direcectory exist, though?
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Old 04-11-06, 04:16 PM   #5
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

@bugger: no, if you have a PCI Express GPU, the directory shouldn't be created/populated.
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Old 04-11-06, 04:35 PM   #6
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

cheers zander. Does it mean that I can disable (nvAGP "0") and unload the agpgart.ko module?
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Old 04-11-06, 04:38 PM   #7
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

@bugger: the NvAGP option won't have an effect on your system; if you wish to eliminate the dependency on agpgart.ko, you can rebuild your kernel w/o AGPGART support and reinstall the NVIDIA kernel module, though.
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Old 04-12-06, 07:40 AM   #8
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

Quote:
Originally Posted by bugger
cheers zander. Does it mean that I can disable (nvAGP "0") and unload the agpgart.ko module?
I tried disabling AGP in the kernel. Even with the CONFIG_AGP=n, when I do a make, it gets changed to =m. The only option with an make xconfig is Y or M. Maybe there's some sort of "AGP compatibility layer" even though the card is PCI-E? Can't unload the module because it's in use by nvidia (and intel_agp on my system if it's loaded).
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Old 04-12-06, 08:41 AM   #9
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

@89TROOPER: yes, CONFIG_AGP may be pulled in as a dependency; please note it's perfectly safe to have agpgart.ko loaded on Linux 2.6, the module doesn't implement any backend drivers.
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Old 04-13-06, 10:44 PM   #10
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

I'm trying to address some stability issues, the 8756 driver documentation makes reference to AGP as a potential cause in Appendix F. Is unloading the AGPGART module a logical next step?

dsorkin@gwar:share> cat /proc/driver/nvidia/cards/0
Model: GeForce 6800 XT
IRQ: 16
Video BIOS: 05.41.02.47.00
Card Type: PCI-E
DMA Size: 39 bits
DMA Mask: 0x7fffffffff

/proc/driver/nvidia/version
NVRM version: NVIDIA Linux x86 Kernel Module 1.0-8756 Wed Mar 29 14:26:26 PST 2006
GCC version: gcc version 4.0.3 (Debian 4.0.3-1)



Thanks,
David Sorkin

Last edited by dsorkin; 04-13-06 at 11:15 PM.
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Old 04-14-06, 05:05 AM   #11
bugger
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

@89TROOPER: you need to disable K8 GART first; then you can get rid of the agpgart.ko module.
Processor type and features --->
[] K8 GART IOMMU support
Device Drivers --->
Character devices --->
< > /dev/agpgart (AGP Support)

I tried both with and without agpgart.ko. As zander already mentioned earlier - there is no difference. The game gl-117 shows around 60 fps without composite (6200TC, Twinview) - I guess it's a bit lame.
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Old 04-14-06, 07:34 AM   #12
89TROOPER
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Default Re: 1-0-8756 - No /proc/driver/nvidia/agp?

Quote:
Originally Posted by bugger
@89TROOPER: you need to disable K8 GART first; then you can get rid of the agpgart.ko module.
Processor type and features --->
[] K8 GART IOMMU support
Device Drivers --->
Character devices --->
< > /dev/agpgart (AGP Support)

I tried both with and without agpgart.ko. As zander already mentioned earlier - there is no difference. The game gl-117 shows around 60 fps without composite (6200TC, Twinview) - I guess it's a bit lame.
Hmm..couldn't find GART_IOMMU in the .config...I won't worry about it if it doesn't matter.
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