From: Ting-Wei Lan <lantw44-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Subject: Kernel panic on Linux 4.1 with intel_iommu=on
Date: Wed, 01 Jul 2015 03:32:33 +0800 [thread overview]
Message-ID: <1435692753.7564.17.camel@gmail.com> (raw)
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?
next reply other threads:[~2015-06-30 19:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-30 19:32 Ting-Wei Lan [this message]
[not found] ` <1435692753.7564.17.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-07-16 14:57 ` Kernel panic on Linux 4.1 with intel_iommu=on Ting-Wei Lan
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=1435692753.7564.17.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