Sometimes when I close my laptop lib, it doesn't go into sleep mode. The wireless network is disconnected, but it seems to get stuck before turning off the screen, harddrive, etc. Clicking suspend from the menu then has no effect, I assume because it's already trying to suspend.

When this happens I choose to reboot or shut down. Then the shutdown bar goes about halfway and gets stuck. If I do Ctrl+F7 the last line is something about shutting down bluetooth. I never use bluetooth so I have tried to disable it to save power.

Which logs should I check next time it happens?

I have a Lenovo S10e with Jaunty netbook remix.