install screen resolution too low - how to adjust?

David Trask dtrask at
Sun Nov 19 23:53:23 GMT 2006

I had a similar issue as my laptops are widescreen...1440x900 and
1280x800.  What works best for me is to manually edit the xorg.conf file. 
Go to /etc/X11/xorg.conf  and scroll down....find the section near the
bottom on "monitors" and see where the resolutions are
displayed...something like this...

"1024x768" "800x600" "640x480"

there will be several for each color range...8 bit, 16 bit, etc

simply add the resolution you want to use as the highest for

PS.  You may want to make a backup copy of xorg.conf prior to
editing...just in case

cp xorg.conf xorg.conf.original

Manu <manu at> writes:
>David J Iannucci a écrit :
>> I've just installed edubuntu 6.10 on an old PII 266 laptop (Toshiba
>> Tecra).  It doesn't seem to recognize the native resolution of my LCD
>> (1024x768), and installed with a default resolution of 640x480(!).  I
>> have looked all over, but can't for the life of me figure out how to
>> reset it to the highest resolution. Yes, I found the system control
>> program which supposedly performs this function, but it doesn't offer me
>> any choice other than 640x480.
>> Any help much appreciated.
>> Dave
>you can reconfigue your graphique server with:
>Ctrl + Alt + F1 for terminal and use
>sudo dpkg-reconfigure xserver-org
>use the auto mode for détecte vidéo card and monitor
>and for the résolution/vidéo mode select 1024x768, 800x600
>and 640x480. Save config and reboot your xserve with command
>Ctrl + Alt + Backspace
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David N. Trask
Technology Teacher/Director
Vassalboro Community School
dtrask at

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