Hi I am running Debian Testing, and for the last two weeks or so, it is impossible to successfully resume the system from hibernation.
The actual hibernation process goes through fine, as also shown in the systemd journal. When powering the system back on, with the `quiet` kernel cmdline removed, I can see that the hibernation image is reloaded successfully. Immediately after that the laptop reboots for no apparent reason, with the result that the file systems are not cleanly unmounted. I have enabled persistent journal for systemd, and when booting, i add `systemd.log_level=debug` to the kernel command line. Unfortunately the error does not appear in the journal. In addition to the foregoing, I have also run the tests mentioned in the 'basic-pm-debugging' document from kernel.org . The laptop fails all the tests, and hibernation does not work even with `init=/bin/sh` specified in the kernel command line as per the referenced document. The hardware is a ThinkPad X40 (yes, old), running Debian testing with the 4.7.0-1-686 #1 SMP Debian 4.7.5-1 kernel. It has 1GB RAM, and a 60GB SSD. At this time I am out of clues on what to check and how. I understand that the hardware is old, but if it would be possible to narrow down the problem to a specific package, etc. I will appreciate any clues or suggestions you can give. Regards Sicelo A. Mhlongo  https://www.kernel.org/doc/Documentation/power/basic-pm-debugging.txt
Description: PGP signature