On 08.05.2009 14:31, Andrew Goodbody wrote: > Uwe Hermann wrote: >> On Fri, May 08, 2009 at 08:37:15AM +0200, Andy Jakobs wrote: >>> I also have this board and a NVIDIA 7600GT PCI-E card. >>> >>> I tested the latest revision a few days ago. Unfortunately there >>> was still no output on the screen after a power-off. So it is no >>> real alternative/replacement for the legacy bios of the board yet. >>> >>> But console output works. >> >> I have the board here, maybe I find the time to look into it. The issue >> stems very likely from an incorrect IRQ routing setup, however fixing >> that is not always trivial unfortunately (and board >> documentation/datasheets >> are not available of course). > > I doubt it's an IRQ issue. The IRQ was used in CGA/EGA adapters to > signal frame sync in order to allow updating of the screen without > causing flicker. This has not been an issue since the introduction of > the original VGA adapter, IIRC.
Most drivers don't work if interrupt routing is not set up correctly. Many modern graphics cards use interrupts a lot for lots of purposes besides signal frame sync. So far, fixing interrupt routing fixed graphics on lots of boards. Regards, Carl-Daniel -- http://www.hailfinger.org/ -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
