於 三，2015-07-01 於 03:32 +0800，Ting-Wei Lan 提到： > 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
The patch was merged in Linux 4.2-rc2. https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ ?id=8b572a4 > > 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 I have upgraded my system to Linux 4.2-rc2, and I can reproduce the problem on it. Here is the full dmesg log: https://bugs.freedesktop.org/attachment.cgi?id=117170 Can anyone here help us resolve this problem? _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
