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Old 04-21-12, 12:02 PM   #32
alan242
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Join Date: Sep 2006
Posts: 20
Default Re: [BUG REPORT] 260.19.36 64-bit Linux driver conflicts with AMD 890FX IOMMU

Quote:
Originally Posted by meralias View Post
Just to add a little more to this:

Currently running on ArchLinux,

Motherboard: Sabertooth 990FX (bios: 0901)
Kernel: 3.3.2-1-ARCH
Driver: 295.40
CPU: Phenom II X4 965

With both IOMMU and the 64Mb option enabled, the xorg driver fails to load, giving the same error as mentioned before. If I pass "iommu=pt" as a boot option, Xorg starts up correctly.
"iommu=pt" allows my system to boot too. But I'm not sure the IOMMU is being used fully when this parameter is specified. See the notes on this patchset http://thread.gmane.org/gmane.linux.kernel/885604.
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