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 -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 4506 bytes Desc: S/MIME Cryptographic Signature URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20130120/4843421c/attachment.bin>
