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Old 01-13-04, 10:52 AM   #1
SuLinUX
 
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Default Enabling Fast Writes?

Hello to you,

cat /proc/driver/nvidia/agp/status

Status: Enabled
Driver: NVIDIA
AGP Rate: 8x
Fast Writes: Disabled
SBA: Enabled


Any idea's on how to enable FW(it's on in the bios) and is there any stability problems.

Thanks
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Old 01-13-04, 01:34 PM   #2
elektronisch
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Update you drivers to the latest ones? You might also have to add an option while loading the module but I dont know because im not home right now.

Good luck,
jay
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Old 01-13-04, 04:46 PM   #3
daclink
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Default enabling fast write

Try adding the following line to /etc/modules.conf

options nvidia NVreg_EnableAGPFW=1
Then run depmod.

This enabled it for me.

DaClink
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Old 01-14-04, 04:41 AM   #4
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Thanks for the replies, daclink that works, thanks
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Old 03-10-04, 10:24 PM   #5
tamran
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Default I have a strange problem with this.

Here's something interesting. I have /etc/modules.conf settings for the nvidia driver as follows:

Code:
options nvidia NVreg_EnableAGPSBA=0 NVreg_EnableAGPFW=0
Here's some cat output:

The status
Code:
# cat /proc/driver/nvidia/agp/status 
Status:          Enabled
Driver:          AGPGART
AGP Rate:        8x
Fast Writes:     Disabled
SBA:             Enabled
The Card
Code:
# cat /proc/driver/nvidia/agp/card   
Fast Writes:     Supported
SBA:             Supported
AGP Rates:       8x 4x 
Registers:       0x1f000e1b:0x1f000302
The Host-Bridge
Code:
# cat /proc/driver/nvidia/agp/host-bridge 
Host Bridge:     PCI device 1106:3188 (VIA Technologies, Inc.)
Fast Writes:     Supported
SBA:             Supported
AGP Rates:       8x 4x 
Registers:       0x1f000a1b:0x00000b02
No matter what I change the nvidia options to in /etc/modules.d/nvidia or /etc/modules.conf I can't seem to change the settings. Help please!

Tamran
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Old 03-11-04, 09:08 AM   #6
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Do you think that this will help with the decrease in performance for the FX5200?
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Old 03-11-04, 12:56 PM   #7
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tamran, did you run depmod after modifying /etc/modules.conf
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Old 03-11-04, 05:47 PM   #8
tamran
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Yeah, I used depmod and I've even rebooted. I just don't get why it's not working!
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Old 03-12-04, 06:53 AM   #9
daclink
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I don't know if it makes any difference, but in my /etc/modules file, i have the line

options nvidia NVreg_EnableAGPSBA=1 NVreg_EnableAGPFW=1

above the line

alias char-major-195 nvidia

I'm unsure if it makes a difference which way round these lines appear, but its worth checking.
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Old 03-12-04, 06:05 PM   #10
tamran
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daclink,

Thanks for the suggestion. That didn't work either. Something strange is afoot here I think ... Is there something I might have forgotten in my kernel? I'm using the AGPgart (it's all that works ATM on amd64) and I can't seem to change the settings on SBA or FW either way. Currently, SBA is stuck ON, and FW is stuck OFF.

Tamran
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Old 03-13-04, 07:35 AM   #11
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Tamran,

try posting the question in a new thread, things tend not to get read by new people when they are on the bottom of another topic.

Other than that its got me beat.

Gluck.

DaClink
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Old 03-17-04, 05:01 PM   #12
LordMorgul
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Default

I did not look deep enough into the code here to determine whether this is actually the problem or not... hopefully you can simply edit the source and try it out to see.

Taken from the 53.36 source (--extract-only option from the installer) in the file: ./usr/src/nv/os-registry.c
Code:
#if defined (NVCPU_IA64)
/*
 * The default on ia64 is to enable AGP side band addressing; if you need
 * to turn it off, change the registry key below.
 */
static int NVreg_EnableAGPSBA = 1;
#else
/*
 * The default on x86 is to disable AGP side band addressing; if you want
 * to turn it on, change the registry key below.
 */
static int NVreg_EnableAGPSBA = 0;
#endif
If during compilation the symbol NVCPU_IA64 is defined then SBA will be enabled. You should extract the AMD64 source and examine it for something similar to this, it likely has the SBA enabled in code.
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