had to learn that the 700Mhz are not quite enough
remember, no hardware acceleration is supported.
It would be great if there are datasheets for your graphics adapter && you have time to write and test at least blitter support for you GPU.
I saw on the pci dev screenshots that there are actually both video devices listet. One is used for the vga and one for the video out. Are those two both Intel(R) 82830M Graphics Controller and is there some programmer who can perhaps write a driver for those?
Some more info on the drivers for windows can be found here:
Intel 830M Embedded Graphics (Intel 82830) Shared Memory (Bios 0,5MB, 1MB, 8MB) http://wiki.freifunk-hannover.de/T-Online_S_100http://wiki.zenega-user.de/index.php/Intel