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Old 02-02-2006, 12:31 AM   #1
no way
Registered: Jan 2006
Location: Europe
Distribution: Ubuntu (main functions almost working by now)
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Question Not all screen resolutions available

Hello community!

I have just installed Ubuntu (5.10 64bit).
Have set up the dpkg-reconfigure xserver-xorg with VESA and have selected at the end all resolutions 1280x1024 and below.

Now I still have only 1024x768 800x600 and 640x480 available in the screen resolution preferences. Anyone knows what I've done wrong?

Thank in advance
Old 02-02-2006, 01:05 AM   #2
Registered: Sep 2004
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Sounds like one of those famous X-configuration problems. You need to look at your xorg.conf file (usually lurking somewhere under /etc directory) and see if it has the correct screen modes. If not, you might have to run xf86config or whatever equivalent is available on Ubuntu. WARNING: configuring X requires extremely intimate knowledge of your hardware; do some research on it first if questions like "vertical refresh rate? 30-50? 40-90? 80-200?" stump you.

My guess here is that the color depth that you've asked for isn't available at the resolution you want. You might get better results from (a) telling it your video card's memory, if it has 4096MB and X only sees it as having 1024MB, for instance, or (b) setting the color depth down if you have it at 24, try it at 16 or so.

Don't feel like the lone ranger: I've easily tried 25 Linux distros in my life and the number one problem I have is getting screen-res/color-depth/video-memory right. My other advice: Pick a live distro that's famous for it's first-rate hardware detection, such as Knoppix. Load up Knoppix, and read the hardware profile in it's KDE info-center menus - you'll have something to go on next time you're helping a less able system detect your hardware.
Old 02-05-2006, 08:05 PM   #3
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Registered: Jan 2006
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Originally Posted by no way
Now I still have only 1024x768 800x600 and 640x480 available in the screen resolution preferences.
Hi Fred,
The following worked for me:

'sudo gedit /ect/X11/xorg.conf'

open xorg.conf file
Try with higher refresh rates like this:

Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 28-70
VertRefresh 43-90

Save file and exit,
I can't remember if I had to reboot or not.......sarah


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