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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.