Normally I don't shutdown my notebook any more in favour of using suspend-to-RAM. The downside is that my encrypted home partition is completely accessible after resume without entering the passphrase. A bad idea if someome steals your notebook...
Looking at cryptsetup's manpage. I've learned that LUKS now supports the
luksResume command. Has
luksResume been integrated in the scripts doing suspend-to-RAM and resume?