How do I enable AGP 2X mode?

[Neoslak]

I have an Asus K7M motherboard, Athlon 650, and a GeForce4 MX440. The manual for this motherboard says it has a North Bridge System Chipset that complies with AGP 2.0 specifications for 1X and 2X AGP modes, so I guess that means that 4X wont' work.

But how do I turn on AGP 2X mode?

I don't seem to see any settings for it in the BIOS.

I'm using the new drivers:

NVIDIA_kernel-1.0-4349
NVIDIA_GLX-1.0-4349

And these seem to work ok with XFree86-4.3.0 on my Slackware 9 system except it seems to only run in 1X mode.

In Xf86Config I have:

Option "NvAgp" "1" # use NVAGP

# cat /proc/driver/nvidia/agp/status

Status: Enabled
Driver: NVIDIA
AGP Rate: 1x
Fast Writes: Disabled
SBA: Disabled

And in /var/log/XFree86.0.log I see:
-----clip-----
...
(II) NVIDIA(0): AGP 1X successfully initialized
-----clip-----

# cat /proc/driver/nvidia/agp/card
Fast Writes: Not Supported
SBA: Not Supported
AGP Rates: 4x 2x 1x
Registers: 0x1f000007:0x0f000101

From # cat /proc/pci
-----clip-----
Bus 0, device 0, function 0:
Host bridge: Advanced Micro Devices [AMD] AMD-751 [Irongate] System Controller (rev 35).
Master Capable. Latency=64.
Prefetchable 32 bit memory at 0xe8000000 [0xebffffff].
Prefetchable 32 bit memory at 0xeddff000 [0xeddfffff].
I/O at 0xdc00 [0xdc03].
Bus 0, device 1, function 0:
PCI bridge: Advanced Micro Devices [AMD] AMD-751 [Irongate] AGP Bridge (rev 1).
Master Capable. Latency=64. Min Gnt=10.
.
.
.
Bus 1, device 5, function 0:
VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX440] (rev 163).
IRQ 11.
Master Capable. Latency=248. Min Gnt=5.Max Lat=1.
Non-prefetchable 32 bit memory at 0xee000000 [0xeeffffff].
Prefetchable 32 bit memory at 0xd8000000 [0xdfffffff].
Prefetchable 32 bit memory at 0xe5c80000 [0xe5cfffff].
-----clip-----


Any help getting AGP 2X enabled would sure be appreciated.


Thanks

Neoslak

[bwkaz]

Search through the nVidia README for "Irongate". It outlines issues your chipset has with any AGP rate higher than 1x.