Hardware: Intel Core i5 CPU 650 @ 3.20GHz Intel Ironlake Desktop In order to use VT-d on this computer, I have to use 'intel_iommu=on intel_iommu=igfx_off' to prevent graphics problems and system crash. This problem happens on Linux 3.7 and later versions, including the latest release, Linux 4.1.
I found Intel-IOMMU.txt says I should file a bug if intel_iommu=igfx_off fixes anything. I filed the bug on freedesktop -> DRI -> DRM/Intel. https://bugs.freedesktop.org/show_bug.cgi?id=91127 After I applied this patch, I no longer saw graphics problems, and Xorg and Wayland can be successfully started without intel_iommu=igfx_off. https://bugs.freedesktop.org/show_bug.cgi?id=91127#c6 However, after using the system for about one hour, the system crashed and printed some messages on the serial console. I have to press the reset button to reboot the machine. https://bugs.freedesktop.org/show_bug.cgi?id=91127#c8 Can anyone here help us resolve this problem? _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
