linux-kernel - Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 24 Mar 2009 21:03:00 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Lutomirski <amluto@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, x86@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>, iommu@...ts.linux-foundation.org,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled

Added some CCs.

On Tuesday 24 March 2009, Andrew Lutomirski wrote:
> On vanilla 2.6.29 (on Ubuntu 8.10), on a Lenovo x200s, my system is
> completely hosed on resume.  It appears that even hard disk IO didn't
> work (trying to do *anything* including getting a dmesg trace just
> spewed sda io errors to the console).  Hence no trace.  I did an
> alt-sysrq-b and the screen went blank and the machine just started
> beeping at me.
> 
> Resume works much better with intel_iommu=off.  (I remember seeing a
> patch go by that purported to fix resume with IOMMU enabled, but it
> didn't work for me.)
> 
> I'd be happy to try to make a better bug report if anyone has any bright ideas.
> 
> --Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/