I have found this bug and meant to blog about it long time ago. As you know, since hardy, Kubuntu used bulletproof-X, so that we would get a basic X as fallback in case there something wrong. If you look at the /etc/X11/xorg.conf you’ll see that the configuration is very basic.
A problem arise if you happen to own a trident microsystems cyber 9525 like I have. Although my laptop (Hitachi Flora 220FX PC7NP7) is 7 years old, i know it is capable of having 1024×768 resolution fullscreen, although only in 16 color depth.
Now, no matter what you tried, you could only have a maximum of 800×600 resolution and the most annoying thing is that the screen can’t not be displayed fullscreen. There is this black area as thick as 3 cm around the screen like a border. (I guess this is what it feel in eee..). Before Hardy, I had no problem like this. Just to remind you that you will still have the same problem in Intrepid.
The fix is really simple actually. Just put the the value for Horizontal Sync and vertical refresh in /etc/X11/xorg.conf like this in the monitor section:
Section “Monitor”
Identifier “Configured Monitor”
HorizSync 30.0 – 80.0
VertRefresh 30.0 – 60.0
Option “DPMS”
Option “PreferredMode” “1024×768″
EndSection
Section “Screen”
…………….
DefaultDepth 16
…………….
EndSection
…..end you’ll get your full display back.
Posted by bakthariq 