I do not know, whether I have done everything right; if necessary, I'll
repeat this process.
The failure of hibernating seems to be related to the buffers that are
not purged: with "free", I can see that most of the RAM is used by
buffers. As it looks, the entire RAM is transferred to the swap;
This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:
apport-collect 822611
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment