Fun and games with xorg

[JonJ678]

Hey. I'm running into problems getting folding running on two graphics cards. One is behaving fine and the other is doing the always fun 'unstable machine' errors.

If anyone has ubuntu running several cards (ideally two+ cards with only one monitor), Id very much appreciate you posting your xorg.conf or offering corrections to this one:

I'm pretty certain I need to add the second card to this, but when I try to do so I get a computer that wont start X at all, and still throws unstable machine errors on the secondary card (BusID 0a:00:00)


# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder58) Tue Nov 4 17:18:57 PST 2008

Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection

Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 30.0 - 110.0
VertRefresh 50.0 - 150.0
Option "DPMS"
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BusID "01:00:00"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
EndSubSection
EndSection


Any help would be much appreciated

 

[ChrissyT88]

Will the driver install not automatically edit you xorg conf file? I dont have any experience of trying this on two separate cards, but when installing the 9800GX2 (dual card), the driver install edited the config file fine and allowed for folding on both cards. I'm pretty sure this was with one monitor attached. Have you tried attaching a second screen (or a dummy plug or another input on your monitor)? I doubt this will fix the problem, but it may be worth a shot.

You could also ask in the official folding forum, in the GPU under WINE thread. The people in there wrote the wrapper etc, so should know what they are talking about! Sorry i personally cannot be of more help, but im sure you will find a solution.

 

[JonJ678]

The driver has a good shot at it, but isn't quite good enough to get everything right.
I have an update to this however. Basically it is a misdiagnosis on my part of the problem. I'm now using

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BusID "01:00:00"
EndSection

Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BusID "0a:00:00"
EndSection

to identify the cards, with no monitor set to use Device1. This leads to the nvidia driver being used on both, and I get to use X on the first one.

The problem actually appears to be that some graphics cards do not play nicely together. The above was a 280gtx and a 9600gso. The 9600 threw errors whatever I did. I found one post on google suggesting that the 2** series and G92 do not play nicely together. Wikipedia gave me 9600gso=8800gs=stripped down 8800gt, and indeed the 9600gso is now peacefully folding beside an 8800GT.

I wish anyone trying to mix these cards in one system luck, its beaten me.

 

[ChrissyT88]

Strange - there are certainly some quirks with different shader counts, but i was not aware of any problems with the WINE setup (not good news for linux guys). Im not really sure how the GX2 worked in linux - i just installed it and it worked! (Well, not right away... maybe after, i dont know, 10 attempts...?). Have you tried hooking up the second card to a second input on your screen (to the VGA input or something) and giving the driver another go? This is how i had mine setup, but it still worked with the VGA cable unplugged. Might be worth a shot?

I think i have linked you here before (not 100% sure though!), but here is the GPU in WINE thread. Maybe ask the guys who wrote it for their input?

http://foldingforum.org/viewtopic.php?f=52&t=3744