Bug#623514: pm-utils: fails to hibernate on Lenovo T500

[Denis Laxalde <dlaxalde@gmail.com>]

Jonathan Nieder a écrit :
> Now that I look more closely, I suspect the dmesg you attached is from
> trying to resume after an unsuccessful hibernation.  What would be
> most useful is to get as much information as possible somehow from the
> _unsuccessful_ hibernation, or even better, to trigger a successful
> hibernation and find what causes the difference between the two.
> 
> Some good advice can be found at
> 
>  http://www.kernel.org/doc/Documentation/power/basic-pm-debugging.txt

Ok. None of 'reboot', 'platform' or 'shutdown' hibernation modes worked
so I went through all steps in 1a "Tests modes of hibernation"
successfully. I then tried step 1b "Testing minimal configuration" (I
append init=/bin/bash to the line starting with 'linux' in grub2 prompt,
is that ok?). There none of the hibernation modes initially worked. I
got a "bash: echo: write error: No such device" message. Then I typed
'swapon -a' (as suggested in dmesg) and invoked hibernation again. Then
the machine halted or rebooted (depending on the mode) normally but I'm
not sure what was supposed to happen here. (I mean, I did not expect to
get back to the init shell I was on, since I left the grub cmd line
untouched upon restart...) Any idea?

-- 
Denis