Hi,

On 2011-03-17, Greg KH wrote:

> 2.6.33-longterm review patch.  If anyone has any objections, please let us 
> know.
[...]
> From: H. Peter Anvin <h...@linux.intel.com>
>
> upstream ea53069231f9317062910d6e772cca4ce93de8c8
> x86, hotplug: Use mwait to offline a processor, fix the legacy case
>
> Here included also some small follow-on patches to the same code:
[...]
> https://bugzilla.kernel.org/show_bug.cgi?id=5471
>
> Signed-off-by: H. Peter Anvin <h...@linux.intel.com>
> Signed-off-by: Len Brown <len.br...@intel.com>
> Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>

Sorry for the sloow response.  Unfortunately this is reported to have
broken hibernation on two machines: an EeePC 1002HA and an Ideapad S10-3.
Frédéric writes:

| I've observed that when resuming from hibernation, sometimes my computer was
| returning to Grub2's menu (without any error message), and I had to do a
| "normal" boot on my Debian Squeeze system (with file systems corrections),
| loosing my hibernation's state.
|   The fail isn't automatic, but seems to happen more frequently after a while
| my computer was disconnected from AC and battery.

Noticed on Debian squeeze (which is based on v2.6.32.y), confirmed
with unpatched v2.6.32.45 and v2.6.33.18.  Backing out the patch
mentioned above avoids trouble.  A newer kernel (based on v2.6.39.y)
does _not_ exhibit the same problem, so it looks like the problem was
introduced in backporting.  http://bugs.debian.org/622259 has
details.

Ideas?

Thanks,
Jonathan

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