I just tried booting 2.6.18-rc1-mm1 again and got the followingYes, I've found ondemand doesn't like being active over suspend-resume. There have been some bugs fixed there, but there are apparently still problems. I switch to powersave over the suspend, and switch back on resume.
stacktrace which suggests a problem with the ondemand governor.
After switching to the performance govenor I was able to suspend on
2.6.18-rc1 and 2.6.18-rc1-mm1.