[NTLUG:Discuss] Video problems on Ubuntu

[David Stanaway]

Dennis Myhand wrote:
> I shut down my Ubuntu system this morning and now after a restart I have 
> only one screen resolution, 640X480, where I normally run 1024X768.  The 
> video chipset is Intel845.  What is the name of the file I need to edit 
> in order to get my screen res back to where I want it?

Hi,

Check your /etc/X11/xorg.conf

First, check the [Section "Screen"] at the bottom,
check your DefaultDepth and the SubSection "Display" have your desired 
screen resolution listed first in the Modes: EG:



Section "Screen"
   ...
   DefaultDepth    16

   ...
   SubSection "Display"
     Depth         16
     Modes         "1024x768" "800x600" "640x480"
   EndSubSection
   ...
EndSection


If that looks right, then maybe you need to check the [Section 
"Device"], and make sure that the correct frover is listed, I think you 
will need the i810 driver

EG:

Section "Device"
   ...
   Driver          "i810"
EndSection


If that looks correct, then you need to try and find the specs for your 
monitor. If you still have the pamphlet that came with it, it should 
list the Technical Specifications and tell you want the vertical and 
horizonal sync ranges are, and you can plug them in to the [Section 
"Monitor"]. If you don't have the pamphlet, most manufacturers have that 
downloadable from their site.

EG: For my display, I have this, but yours will certainly be different.

Section "Monitor"
   ...
   HorizSync       31-80
   VertRefresh     60-75
   ...
EndSection