Messages in this thread | | | Date | Tue, 24 Mar 2009 21:32:59 +0100 | From | Ingo Molnar <> | Subject | Re: 2.6.29: can't resume from suspend with DMAR (intel iommu) enabled |
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(Cc:s added)
* Andrew Lutomirski <amluto@gmail.com> 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.
i have a Lenovo T500 that does not even boot with with DMAR enabled in the BIOS (it's default-off), i get this panic in early bootup:
DMAR hardware is malfunctioning
So i dont get to test suspend/resume ;-)
Ingo
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