I'm not sure if my issue is a duplicate of other's, but suspend no longer works on my system after upgrading to the latest -beta. This is on an AMD64 (64-bit install) with an nVidia card, proprietary drivers not loaded. I started running tests (gotten from http://www.mjmwired.net/kernel/Documentation/power/basic-pm-debugging.txt) in "recovery mode" to test Suspend / Resume:
Running:" echo reboot > /sys/power/disk; echo disk > /sys/power/state" reboots my computer, but trashes my swapfile. After re-running mkswap on /dev/hda4 (and adding resume=/dev/hda4 to grub command line), I am able to resume, but the text console is corrupted. Its difficult to describe, but pressing enter just scrolls the ubuntu logo (which never goes away) to the left. At the bottom, there is a garbled white strip with random pixel noise that increases by one pixel each time I press enter. It does look as if it responds to commands, though.
Runing: "echo test > /sys/power/disk; echo disk > /sys/power/state" brings the system back fine, repeatedly.