I decided to live dangerously and take my antiX-m8.5-base release into the land of Sid. After dist-upgrading, s2disk stopped working properly.

1.) /etc/uswsusp.conf had the line"shutdown method = reboot" in it, rather than the expected"shutdown method = shutdown"

2.) after fixing that line and running update-initramfs -u, it would not resume, but would rather simply restart as if from a cold boot. Turns out there was no /etc/initramfs-tools/conf.d/resume file. After looking at debian bug 576700, which seems to indicate problems with earlier versions of initramfs-tools and the contents of"resume," I created a"resume" file with the line"RESUME=/dev/disk/by-uuid/" and my swap partition's UUID. Ran update-initramfs -u again. Ran s2disk, restarted computer, resume worked!

Everything else seems to be working fine thus far (knocks on wood)...