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Old 06-07-07, 05:28 PM   #4
GTX 470 SOC @ Gentoo
akimalahey's Avatar
Join Date: Jun 2007
Location: Germany
Posts: 17
Default Re: 7950gx2: freezes when multigpu is enabled


In rare cases multigpu worked with 100.14.06 but beryl had graphic errors and effects were blinking. Same with Quake.

Now i am back at 9755. Sometimes it freezes while loggin in, sometimes i can play Quake using both gpus. Beryl is blinking again and glxgears most time starts as black window.

I found messages like that in Xorg.0.log and kdm.log

(WW) NVIDIA: No matching Device section for instance (BusID PCI:3:0:0) found
(II) Module already built-in
(EE) NVIDIA(0): The NVIDIA graphics device PCI:4:0:0 bound to this Multi-GPU X
(EE) NVIDIA(0): screen is not the Multi-GPU parent device. This
(EE) NVIDIA(0): configuration is not currently supported. Please add
(EE) NVIDIA(0): 'BusID "PCI:3:0:0"' to the Multi-GPU "Device" section in
(EE) NVIDIA(0): the X configuration file.
(EE) NVIDIA(0): Only one GPU will be used for this X screen.

(II) Primary Device is: PCI 04:00:0
(WW) NVIDIA: No matching Device section for instance (BusID PCI:3:0:0) found
(--) Assigning device section with no busID to primary device

my xorg-device part:

Section "Device"

Identifier "nvidia"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 7950 GX2"
Option "NoLogo" "true"
Option "MultiGPU" "Auto"
Option "RenderAccel" "true"
Option "Coolbits" "1"
Option "AllowGLXWithComposite" "true"
Option "AddARGBGLXVisuals" "True"

Something horrible wrong? How should the config look like for a 7950gx2?

After adding BusID "PCI:3:0:0" X doesn't start anymore. Without a BusID and MultiGPU entry the system runs normal.

Do i need one Device entry for every card or just one with MultiGPU option? I don't want to configure an x-server on every gpu.
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