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Suspend to disk is broken on 3.12.13
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agentsmith83
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Joined: 15 Sep 2011
Posts: 12
Location: RU,Moscow

PostPosted: Wed Apr 30, 2014 5:55 am    Post subject: Suspend to disk is broken on 3.12.13 Reply with quote

Hello.
Suspend to disk is not working after migration to gentoo kernel 3.12.13.
System hangs after freezing activities.
Suspend to ram work without any problem.

Suspend to disk worked on previous gentoo kernel (3.10.25)
According to Linux kernel documentation I tried to debug power manager susbsystem.
I have got following results:
1) freezer test - work perfectly;
2) devices test - mostly hangs;
3) platform test - hangs on 100% cases.

I played with kernel configuration and have found, that intel_iommu driver is a reason of my problem. Hibernate works if I disable intel_iommu in kernel (via config or command line parameter).

My hardware is HP probook 6460b.
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