On Thu, Oct 28, 2010 at 11:48 AM, Scott Duplichan scott@notabs.org wrote:
]> One problem is that the in-box ATI driver for the UMA graphics is ]> unstable. ]Even with the factory BIOS?
The reference BIOS works fine, so this is a coreboot problem. I have added missing family 10h code to the coreboot RS780 GFX initialization, and enabled HT3 for the link. I have added missing NP attributes to the frame buffer mapping. But the driver still fails after a few seconds. There is more debugging to do here. This is the most serious remaining Win7 problem I know of for RS780/SB700 boards.
This sounds like a much higher priority problem than the two video cards problem. As a way to work-around it, maybe you should just use Marc's suggestion and disable the UMA device in the devicetree.
I wonder what the driver expects. Is it looking for the memory allocation at fixed locations? Do you have a register dump for the ATI device with coreboot and the factory BIOS before an OS takes over?
Thanks, Myles