* On 19.01.2013 05:13 PM, Mihai Moldovan wrote:
- 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. [...]
Which of course will work, as 2e10 is my DRAM controller as reported by lspci, sorry.
But, shouldn't the "DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2eXX, quirk_iommu_rwbf);" calls be rather " DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_g4x_gfx);" ?
The current patch errors out on my while compiling as quirk_iommu_rwbf is not yet defined at that place.