From: Ting-Wei Lan <lantw44-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Re: Kernel panic on Linux 4.1 with intel_iommu=on
Date: Thu, 16 Jul 2015 22:57:13 +0800 [thread overview]
Message-ID: <1437058633.9049.5.camel@gmail.com> (raw)
In-Reply-To: <1435692753.7564.17.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
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?
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prev parent reply other threads:[~2015-07-16 14:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-30 19:32 Kernel panic on Linux 4.1 with intel_iommu=on Ting-Wei Lan
[not found] ` <1435692753.7564.17.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-07-16 14:57 ` Ting-Wei Lan [this message]
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