[ILUG-BOM] cannot set resolution to 1440x900 on Debian Etch

I have installed Debian Etch on a gigabyte motherboard GA-MA74GM-S2, having AMD 740G + SB700 Chipset. The website says it has ATI Radeon 2100 integrated graphics.

Output of lspci is as follows: 01:05.0 VGA compatible controller: ATI Technologies Inc Unknown device 796e

This driver selected for this is "vesa". If I try "ati", X server refuses to start.

But the main problem is resolution - it is set at 1280x1024. I tried using "dpkg-reconfigure xserver-xorg" and setting resolution to 1440X900, but at that, the resolution was set to 1400x1050 when X server was restarted.

Even adding the resolution manually to the Modes lines in xorg.conf and restarting X server did not solve the issue.

How can I fix this?

Thanks. -- Rohit V. Bhute