On Sat, 2012-05-12 at 11:07 +0000, W. Martin Borgert wrote: > Package: linux-2.6 > Version: 3.2.16-1 > Severity: normal > > Both on Wheezy and Squeeze (kernel from backports) hibernate (e.g. by > pressing the Fn-F12 button or by using the hibernate button in XFCE), > the screen gets dark and the computer does something, but it does not > switch off. After some minutes, I get impatient and switch it off, so > it does a normal reboot afterwards. > > How can I debug the hibernation process? Are there any log messages to > look for?
See <http://www.kernel.org/doc/Documentation/power/basic-pm-debugging.txt>. Also, version 3.2.17-1 (to be uploaded shortly) has this fix which might be relevant: commit e0791b5ffb456aa7de29391297e5dc93c1d123ff Author: Bojan Smojver <bo...@rexursive.com> Date: Tue Apr 24 23:53:28 2012 +0200 PM / Hibernate: fix the number of pages used for hibernate/thaw buffering commit f8262d476823a7ea1eb497ff9676d1eab2393c75 upstream. Hibernation regression fix, since 3.2. Calculate the number of required free pages based on non-high memory pages only, because that is where the buffers will come from. Commit 081a9d043c983f161b78fdc4671324d1342b86bc introduced a new buffer page allocation logic during hibernation, in order to improve the performance. The amount of pages allocated was calculated based on total amount of pages available, although only non-high memory pages are usable for this purpose. This caused hibernation code to attempt to over allocate pages on platforms that have high memory, which led to hangs. Ben. -- Ben Hutchings Experience is directly proportional to the value of equipment destroyed. - Carolyn Scheppner
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