View Full Version : [ubuntu] help w/ Ibook G3 screen resolution

May 3rd, 2008, 04:26 PM
Hello, I installed ubuntu 8.04 hardy heron.. the screen resolution is stuck to 800x600 as the system doesn't recognize the ati radeon. How can I solve this problem?
I searched in the forum but I just found confusion.
Does anyone know the final solution for that issue?

May 3rd, 2008, 08:59 PM
Have you tried manually editing your /etc/X11/xorg.conf file, and adding a modules section that disables glx and dri - at least temporarily? An example can be seen in this wiki for G3 iMacs, even though you are using an iBook:


Even though it pertains to 3d on the ati, there are some good general tips here:

From there, perhaps you can then run

xrandr -q

and then set the native resolution with:

xrandr -s 1024x768 -r 60

If that works, check the gui display prefs again and see if it sticks.

Sorry to say I don't have an ati-equipped box anymore, so just something to try anyway...

May 4th, 2008, 11:59 AM
thanks but that is not the way as the mode is not supported.
I found a working solution though.
This is what I added on my xorg.conf file:

Section "Device"
Identifier "ATI Rage 128"
Driver "r128"
BusID "PCI:0:16:0"
Option "UseFBDev" "true"

Section "Monitor"
Identifier "Configured Monitor"
HorizSync 60-60
VertRefresh 43-117

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"

May 5th, 2008, 10:19 PM
That's great! Does it still work if you change your two Depths-lines to 24 instead of 16?

May 5th, 2008, 11:35 PM
yes it works even with 24 instead of 16.