intel 915 GM VGA color depth

Dears,

i have a Toshiba satellite m45 with openSUSE 11.0 . when i open SaX2, i cannot change the color depth to 32 bit because it is not there!! there is only 24 bits. i see in Ubuntu that it can support 32 bit color depth.

i had 915resolution but it didn’t help.
i cannot use the intellinuxgraphics.org drivers because they do not compile!!

any suggestions are welcome