[Bug 21020] [BISECTED] xf86-video-ati fails spectacularly on X startup ( on DEC Alpha)

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=21020





--- Comment #3 from Matt Turner <mattst88 at gmail.com>  2009-04-03 18:10:38 PST ---
(In reply to comment #2)
> So does it still work with Option "GARTSize" "8"? What about "16"?'

Yes, setting GARTSize to 8 allows X to start properly. With 16, it fails in the
same fashion.

> When the kernel agpgart modules are loaded, what do they say about the aperture
> size? Assuming it's >= 32 MB: If I'm reading the dmesg correctly, the machine
> seems to have at least 4 GB of RAM? Does the problem occur if you boot with
> something like mem=1g or mem=2g?

I tried booting with mem=1g and GARTSize 16. It failed in the same way.

This motherboard is a UP1500, made by Samsung, and never had all the firmware
bugs worked out. For instance, the PALcode initializes the AGP GART in such a
way that it is unusable on Alpha. Hence, the card must be forced into PCI mode
in xorg.conf to even start.

See http://bugzilla.kernel.org/show_bug.cgi?id=12127#c6 for a more detailed
analysis. I'll contact the poster of that message to see if he can offer
insight into this problem.


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