Ubuntu 12.04 64bit refuses to hibernate when battery is critically low. Instead it does a complete shutdown which is unnecessary and can cause loss of data.

I have enabled Hibernate (pm-hibernate) on following the common instructions I tested pm-hibernate it is works fine when run manually.

I have set my power options to hibernate "When Power is Critically Low". This has also been verified by using dconf Editor. Under org > gnome > settings-daemon > plugins > power > critical-battery-action it is set to "hibernate". Under the same schema, time-action is set to "120".

I would like to see what is happening just prior to this shutdown. I would like to know what logs to search to see if pm-hibernate is actually failing, or if it is being ignored entirely.

Barring figuring this out on my own, is there a suggested work around?