[Nouveau] [Bug 29800] drm detects GPU lockup with dual cards/Xorg hard locks even with single screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29800

--- Comment #9 from Thomas Spear <Speeddymon at gmail.com> 2010-08-30 11:57:10 PDT ---
After a coworker got his F13 x86 install working with 3 monitors (with the
blob) by removing NetworkManager, I started looking into my problem some more,
and first tried removing NetworkManager. That did not change anything.

So I googled for the NVIDIA(0) WAIT error that I had from the bottom of the X
log from when I used the blob. Sure enough, first result is a redhat bug
(closed as notabug). The error is apparently in the Intel IOMMU, and adding
intel_iommu=off to the boot command line seems to fix the hard lockup and
allows my x86_64 install of F13 to use all 3 screens on both cards with the
blob.

I will check if this has also fixed nouveau sometime soon and report back if it
has.

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