Tengo una Dell D600 con la Radeon 9000 RV250. Hace ya un tiempo que tenía problemas para que el video anduviese fluido en Ubuntu. Encontré una solución. No sé si anda el 3D (no lo he probado -se agradecen comentarios al respecto), pero el video anda bien. Parece que el secreto es cambiar el método de aceleración a XAA (ver http://www.freedomit.co.nz/index.php/Blog-Linux/ubuntu-904-on-my-dell-latitude-d600.html.
Por cierto: acá va mi /etc/X11/xorg.conf
Section “InputDevice”Identifier “Generic Keyboard”Driver “kbd”Option “XkbRules” “xorg”Option “XkbModel” “pc105″Option “XkbLayout” “us”EndSectionSection “InputDevice”Identifier “Configured Mouse”Driver “mouse”Option “CorePointer”Option “Device” “/dev/input/mice”Option “Protocol” “ImPS/2″#Option “Emulate3Buttons” “true”#Option “EmulateWheel” “true”Option “EmulateWheelButton” “2″Option “ZAxisMapping” “4 5″EndSectionSection “InputDevice”Identifier “Synaptics Touchpad”Driver “synaptics”Option “SendCoreEvents” “true”Option “Device” “/dev/psaux”Option “Protocol” “auto-dev”Option “HorizEdgeScroll” “0″EndSectionSection “Device”Identifier “Radeon 9000 RV250″Driver “ati”BusID “PCI:1:0:0″Option “XAANoOffscreenPixmaps” “true”Option “GARTSize” “64″Option “AccelMethod” “XAA”EndSectionSection “Monitor”Identifier “Configured Monitor”EndSectionSection “Screen”Identifier “Default Screen”Monitor “Configured Monitor”Device “Configured Video Device”# SubSection “Display”# Virtual 2680 1050# EndSubSectionEndSectionSection “ServerLayout”Identifier “Default Layout”Screen “Default Screen”InputDevice “Synaptics Touchpad”EndSectionSection “Module”Load “dbe”EndSectionSection “DRI”Mode 0666EndSectionSection “Extensions”Option “Composite” “Enable”EndSectionSection “InputDevice”
Identifier “Generic Keyboard”
Driver “kbd”
Option “XkbRules” “xorg”
Option “XkbModel” “pc105″
Option “XkbLayout” “us”
EndSection
Section “InputDevice”
Identifier “Configured Mouse”
Driver “mouse”
Option “CorePointer”
Option “Device” “/dev/input/mice”
Option “Protocol” “ImPS/2″
#Option “Emulate3Buttons” “true”
#Option “EmulateWheel” “true”
Option “EmulateWheelButton” “2″
Option “ZAxisMapping” “4 5″
EndSection
Section “InputDevice”
Identifier “Synaptics Touchpad”
Driver “synaptics”
Option “SendCoreEvents” “true”
Option “Device” “/dev/psaux”
Option “Protocol” “auto-dev”
Option “HorizEdgeScroll” “0″
EndSection
Section “Device”
Identifier “Radeon 9000 RV250″
Driver “ati”
BusID “PCI:1:0:0″
Option “XAANoOffscreenPixmaps” “true”
Option “GARTSize” “64″
Option “AccelMethod” “XAA”
EndSection
Section “Monitor”
Identifier “Configured Monitor”
EndSection
Section “Screen”
Identifier “Default Screen”
Monitor “Configured Monitor”
Device “Configured Video Device”
# SubSection “Display”
# Virtual 2680 1050
# EndSubSection
EndSection
Section “ServerLayout”
Identifier “Default Layout”
Screen “Default Screen”
InputDevice “Synaptics Touchpad”
EndSection
Section “Module”
Load “dbe”
EndSection
Section “DRI”
Mode 0666
EndSection
Section “Extensions”
Option “Composite” “Enable”
EndSection
Escrito por allentiak 
