Hi,
I am using ubuntu 11.04 with a thinkpad x300.
It used to suspend and wake up properly, but since last month, when coming up from suspend all turns on except the monitor and the only possibility I found to turn it on is to restart the computer.
I tried to run ubuntu from an usb key, and it goes to sleep and wakes up correctly, so it should be a software problem
Hibernation works fine.

thanks