I'm running Ubuntu 11.04 x86_64 2.6.38-10-generic. I have two GTX 460s, and I'm using Nvidia driver 270.41.06. Without SLI enabled, the computer runs fine. However, after running nvidia-xconfig --sli=Auto
and rebooting, performance drops. When I do anything, even as simple as scrolling a webpage, it's choppy and the cards get excessively hot (in the red in Nvidia X Server Settings). In Windows 7, this isn't a problem (making this even more annoying). SLI does seem to be "working", as nvidia-xconfig --query-gpu-info
shows both cards attached to the screen in SLi.
Any ideas?
Here is my xorg.conf:
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 270.41.06 (buildmeister@swio-display-x86-rhel47-08.nvidia.com) Mon Apr 18 15:14:00 PDT 2011
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 270.29 (buildd@allspice) Fri Feb 25 14:42:07 UTC 2011
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
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"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Ancor Communications Inc VE228"
HorizSync 30.0 - 83.0
VertRefresh 50.0 - 76.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 460"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "nvidia-auto-select +0+0"
Option "SLI" "Auto"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Here is everything after running
nvidia-xconfig -a --sli=Auto
. It runs the same and I believe the gpu-query-info is the same as before.
xorg.conf
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 275.19 (buildmeister@swio-display-x86-rhel47-07.nvidia.com) Tue Jul 12 18:35:38 PDT 2011
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 270.29 (buildd@allspice) Fri Feb 25 14:42:07 UTC 2011
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
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 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 460"
BusID "PCI:1:0:0"
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 460"
BusID "PCI:3:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "SLI" "Auto"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "SLI" "Auto"
SubSection "Display"
Depth 24
EndSubSection
EndSection
lspci | grep VGA
01:00.0 VGA compatible controller: nVidia Corporation GF104 [GeForce GTX 460] (rev a1)
03:00.0 VGA compatible controller: nVidia Corporation GF104 [GeForce GTX 460] (rev a1)
sudo nvidia-xconfig --query-gpu-info
Number of GPUs: 2
GPU #0:
Name : GeForce GTX 460
PCI BusID : PCI:1:0:0
Number of Display Devices: 1
Display Device 0 (DFP-0):
EDID Name : Ancor Communications Inc VE228
Minimum HorizSync : 30.000 kHz
Maximum HorizSync : 83.000 kHz
Minimum VertRefresh : 50 Hz
Maximum VertRefresh : 76 Hz
Maximum PixelClock : 170.000 MHz
Maximum Width : 1920 pixels
Maximum Height : 1080 pixels
Preferred Width : 1920 pixels
Preferred Height : 1080 pixels
Preferred VertRefresh : 60 Hz
Physical Width : 480 mm
Physical Height : 270 mm
GPU #1:
Name : GeForce GTX 460
PCI BusID : PCI:3:0:0
Number of Display Devices: 1
Display Device 0 (DFP-0):
EDID Name : Ancor Communications Inc VE228
Minimum HorizSync : 30.000 kHz
Maximum HorizSync : 83.000 kHz
Minimum VertRefresh : 50 Hz
Maximum VertRefresh : 76 Hz
Maximum PixelClock : 170.000 MHz
Maximum Width : 1920 pixels
Maximum Height : 1080 pixels
Preferred Width : 1920 pixels
Preferred Height : 1080 pixels
Preferred VertRefresh : 60 Hz
Physical Width : 480 mm
Physical Height : 270 mm
EDIT: I updated to 275.19, no change.
EDIT: Ended up selling the second one. Problem solved I guess.