Incorrect 800x600 resolution for SIS M672 graphics

[Narcis Garcia]

Binary package hint: xserver-xorg-video-sis

Chipset SiS M672 + SiS 968 on a laptop (https://wiki.ubuntu.com/LaptopTestingTeam/HundyxW765S) with a LCD resolution of 1366x768.

With Live-CD (Ubuntu GNU/Linux 9.10 Karmic Koala) the desktop starts with a 800x600 resolution, and the only alternative available with the gnome-display-properties is 640x480.
When startup the computer with an external monitor plugged and working, then the desktop enters in 1024x768 resolution, and then I feel that the driver really can work with higer resolutions than 800x600 with the "SiS M672" device.

I want to use only Ubuntu drivers or any other driver provided by the manufacturer or a clear free software project.

[Narcis Garcia (narcisgarcia)]

These other bugs may be related:
https://bugs.launchpad.net/ubuntu/+bug/289537
https://bugs.launchpad.net/ubuntu/+bug/301958