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AGP FastWrite and SideBand Addressing (76.64)


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#1 Guest_Fuzzo_*

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Posted 12 June 2005 - 07:17 AM

Hi all!
I've a Dell 5150 laptop, and this site is the best for my mobile graphics card.
I'm running on Gentoo Linux 2.6.11-r9 and i have this settings:
fuzzo@Dell5150 / $ cat /proc/driver/nvidia/registry
VideoMemoryTypeOverride: 1
EnableVia4x: 0
EnableALiAGP: 0
NvAGP: 1
ReqAGPRate: 7
EnableAGPSBA: 0
EnableAGPFW: 0
SoftEDIDs: 1
Mobile: 4294967295
ResmanDebugLevel: 4294967295
FlatPanelMode: 0
DevicesConnected: 0
VideoEnhancement: 0
RmLogonRC: 1
ModifyDeviceFiles: 1
DeviceFileUID: 0
DeviceFileGID: 0
DeviceFileMode: 438
This is the nvidia module parameter now active...
Look at my system capabilities:
fuzzo@Dell5150 / $ cat /proc/driver/nvidia/agp/card
Fast Writes:     Supported
SBA:             Supported
AGP Rates:       4x 2x 1x
Registers:       0x1f000217:0x1f000104

fuzzo@Dell5150 / $ cat /proc/driver/nvidia/agp/host-bridge
Host Bridge:     Intel Corp. 82852/855GM Host Bridge
Fast Writes:     Supported
SBA:             Supported
AGP Rates:       4x 2x 1x
Registers:       0x1f000217:0x00000104
It says that i can enable FW and SBA :P but...
fuzzo@Dell5150 / $ cat /proc/driver/nvidia/agp/status
Status:          Enabled
Driver:          NVIDIA
AGP Rate:        4x
Fast Writes:     Disabled
SBA:             Disabled
This says that i use NVIDIA AGP driver (instead of kernel's AGPGART) with 4x speed, but without FW & SBA :)
I tried to load module with:
NVreg_EnableAGPSBA=1 NVreg_EnableAGPFW=1
to enable both features, but X server hangs and my display went "unreadable" :)

How i can activate FW and SBA without problems with X?
Thanks! :(

#2 Guest_Guest_*

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Posted 27 September 2005 - 02:47 AM

Same laptop - same problem. Haven't found a solution yet.

Best regards
Lars

#3 Guest_Guest_*

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Posted 21 April 2006 - 02:43 PM

Same laptop - same problem. Haven't found a solution yet.

Best regards
Lars


There is a file you can edit before compiling the driver to default most of those to the enabled position. As far as AGP goes, unless you have an AGP card in your laptop, you shouldn't be using the NvAGP driver. If you are using PCX/PCIe use the system driver but make sure the rest are enabled.

Also check your xorg.conf for redundant settings.

#4 Bill

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Posted 21 April 2006 - 04:44 PM

SBA can make it unstable anyway, with practically no performance increase really, you should just leave it off.