Messages in this thread |  | | Date | Fri, 1 Nov 2013 14:21:07 +0100 | Subject | Re: VT-d and x2apic: broken resume after suspend to ram | From | Peter Senna Tschudin <> |
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On Fri, Nov 1, 2013 at 2:07 PM, Joerg Roedel <joro@8bytes.org> wrote: > Hi Peter, > > On Fri, Nov 01, 2013 at 01:37:36PM +0100, Peter Senna Tschudin wrote: >> I have one notebook that is failing to resume after suspend to ram. >> I've filled a bug report back on the 2.6.41 days: >> >> https://bugzilla.redhat.com/show_bug.cgi?id=787299 >> >> The issue is that trying to resume after suspending to ram freezes the >> computer. The resume starts well, but then it hangs. >> >> Yesterday I found that this may be related to VT-d / x2apic. If I >> disable VT-d on the BIOS, suspend / resume works fine. If I enable >> VT-d and pass nox2apic as boot parameter to Kernel suspend and resume >> works fine. I would like some pointers to fix this issue. Can you help >> me? >> >> Only when I have VT-d enabled, dmesg gives me additional output: >> [ 0.023913] IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1 >> [ 0.024080] Enabled IRQ remapping in x2apic mode >> [ 0.024081] Enabling x2apic >> [ 0.024082] Enabled x2apic >> [ 0.024087] Switched APIC routing to cluster x2apic. >> >> The notebook is Toshiba R830-10p with i7-2620M. > > Which kernels have you tried? Does it happen with all of them or is > there a kernel-version where this started?
I'm using 3.11.6-200.fc19.x86_64. I always had VT-d enabled, and suspend / resume never worked on Linux. I did not know that disabling VT-d could be a workaround to the resume issue until yesterday.
Does this have anything in common to: https://bugzilla.redhat.com/show_bug.cgi?id=752613
> > > Joerg > >
-- Peter
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