screen resolution stuck at 640x480 in Hoary

[Michel De Gouveia]

H Postma a écrit :

>Hi all,
>
>I just upgraded from a clean new install of Warty to Hoary. I have a
>Sony Vaio SRX77 and have had great experience with Redhat 7.2/Debian
>unstable/ and now Ubuntu Warty on it so far.
>
>Now I have a vanilla install of hoary on a second partition.
>
>Here's the problem.
>*  When I boot and gnome starts (or I restart gdm), the display is
>stuck in 640x480.
>* I can manually change it to sth else with gnome-display-properties,
>but upon restarting gdm, we're back at 640
>* when an external monitor is not attached, higher resolutions don't
>even appear in gnome-display-properties.
>
>Now here's the interesting thing:
>Neither xorg.conf or the xf86config file show a 640x480 option. The
>only allowed resolution is 1024x768, so I have no idea how it gets to
>640x480.
>
>And the xorg.conf and xf86config file are identical, and identical to
>the one I run in warty.
>
>Anybody have an idea how to keep the system in 1024x768?
>
>Thanks so much, Henk
>
>  
>
What is your graphic card ?
Did you try sudo dpkg-reconfigure xserver-xorg
In my laptop Toshiba, I have 1024*768 with nvidia card with no problem. 
(Hoary Array 3)
With my office computer,  Intel Graphics 845 GL, I have the same problem.
With Warty, driver i810, 1024*768
With Hoary Array 3, driver i810, 800*600 or 640*480 only with 53 Hz.
I tried dpkg-reconfigure xserver-xorg but I have the same problem.