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Old 07-31-2007, 03:20 PM   #1
Registered: Sep 2005
Posts: 49

Rep: Reputation: 15
Compiz using GPU or CPU???


I'm using the latest (3.4a) version of Sabayon Linux. It's great. The graphics and design are amazing. It comes pre-installed with loads of goodies. It uses NVIDIA binary drivers out of the box.

Anyways, the problem is that compiz runs slower/jerkier than with other distros. Effects get stuck midway (such as opening/closing windows). The OpenGL screensavers seem to run slower than normal. I tried re-installing the NVIDIA binary drivers manually, but no improvement. I have a GeForce 8500GT graphic card.

How can I be 100% sure my system is using the GPU to its fullest to render? Is it possible that rendering is taking place in software? My CPU is Core2Duo 6350. I see the NVIDIA Logo when X starts. My xorg.conf file looks like this (entries unrelated to graphics are not included):

Section "Module"

Load "dbe"
Load "i2c"
Load "glx"
Load "ddc"
Load "type1"
Load "freetype"
Load "extmod"
Load "synaptics"
Load "vbe"
# Load "dri"


Section "Monitor"

Identifier "Generic Monitor"
#Option "DPMS"

VertRefresh 43 - 60
HorizSync 28 - 80


Section "Device"
Identifier "nVidia"
Driver "nvidia" # do not remove vesa
#Option "RenderAccel" "on"
#Option "XAANoOffscreenPixmaps"
#Option "BusType" "PCI"
#Option "ColorTiling" "on"
#Option "EnablePageFlip" "on"

Section "Screen"

# The Identifier, Device and Monitor lines must be present

Identifier "Screen 1"
Device "nVidia"
Monitor "Generic Monitor"
#Option "AddARGBGLXVisuals" "true"

# The favoured Depth and/or Bpp may be specified here

DefaultDepth 24

SubSection "Display"
Depth 8
ViewPort 0 0
#Modes "1024x768" "800x600" "640x480"

SubSection "Display"
Depth 16
ViewPort 0 0
#Modes "1024x768" "800x600" "640x480"

SubSection "Display"
Depth 24
ViewPort 0 0
#Modes "1024x768" "800x600" "640x480"


Section "DRI"
Mode 0666

Section "Extensions"
#Option "Composite" "Enable"
Old 07-31-2007, 03:33 PM   #2
Senior Member
Registered: Jan 2005
Location: Nottingham, UK
Distribution: Mageia 6, KDE Neon
Posts: 4,313

Rep: Reputation: 212Reputation: 212Reputation: 212
You have a lot of options like Render Acceleration commented (#) out. Perhaps enabling some will give you better perfomance. Naturally make a copy of your xorg.conf before doing any changes, just in case things go wrong.


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