* On 19.01.2013 02:27 PM, Daniel Vetter wrote: > You have a gen4.5 chipset which is known to be utterly broken for > IOMMU+intel gpu. Nice description for what I'm seeing. ;) After some more hours of uptime I'm inclined to say, that "intel_iommu=off iommu=off" fixes my random freezes as well. Alas, the USB and PCI(e) problems are still around, but I could test recompiling 3.7.2 with Intel IOMMU turned off completely in the kernel config. Interestingly, my 3.0.2 kernel which worked fine for so long doesn't even *have* support for VT-d/Intel IOMMU. This could explain why I wasn't bit by those problems on all previous versions. > [...] and we've never added the proper > quirks. See https://bugzilla.kernel.org/show_bug.cgi?id=51921 for a > proposed patch to fix this (i.e. automatically set > intel_iommu=igfx_off for affected platfroms). Testing highly welcome. From a quick glance, I don't think this patch will work as-is, my PCI ID 2e12 is missing. I'll add it to the relevant section. But even if it worked, I'd still have the "box freezes randomly" issue (mostly within 5 to 60 minutes of uptime). :( The only way to get rid of this is disabling Intel IOMMU as a whole via kernel parameters intel_iommu=off iommu=off. Anyway, I'll give it a try. Best regards, Mihai
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