Messages in this thread | | | Date | Sun, 20 Jan 2013 22:52:49 +0100 | From | Mihai Moldovan <> | Subject | Re: i915-related and general system freezes with specific kernel config // IOMMU |
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Hi Daniel,
the patch does work, i.e., it turns off DMAR for the graphics card and alleviates the freezes when loading i915/kms.
However, still seeing random machine freezes with it (being consistent with the behavior I've experienced with intel_iommu=igfx_off).
The patch + forcing RWBF is working, too. Interestingly, this version didn't randomly freeze yet, after more than 5 hours of uptime! I'll leave the box running until tomorrow to make sure I did stick around long enough.
All those tested kernels were able to handle USB and PCI(e) devices.
I still have to test turning off IOMMU in general and Intel IOMMU specifically. Will probably do this tomorrow.
Thank you so far! :)
Mihai
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