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?
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1437058633.9049.5.camel@gmail.com \
--to=lantw44-re5jqeeqqe8avxtiumwx3w@public.gmane.org \
--cc=iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox