[coreboot] status of coreboot on Asus A8N-E

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Fri May 8 14:58:51 CEST 2009

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.



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