[PATCH 0/1][Natty] Regression on hibernate with x86_64 in

Herton Ronaldo Krzesinski herton.krzesinski at canonical.com
Thu Apr 7 21:15:47 UTC 2011


I don't know if everyone is seeing this, but yesterday I hit a bug in
hibernate, and filled a bug for it (LP#752870). I would expect hibernate
not working on a lot of amd64 machines since (may be all,
depending by luck of initialized value of mmu_cr4_features var).

Basically, with it crashes consistently right after image is
restored in resume from hibernate on a test machine here with natty
amd64. After fighting a bit with grub2 to get a full picture of the oops,
I went to bisect, and results are on the ticket.

After getting the fault commit, I went to poke at the code and found the
issue, and right after I saw upstream getting a fix today afternoon. As
a response to this, attached goes the cherry picked fix for natty, the
only one currently affected. I confirmed the fix works on my machine.

Please consider applying it. The patch isn't with Cc stable, I'll try to
contact/send this later to stable ML. Also would be good more testers to
confirm the issue, I'm curious about how widespread is this problem.


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