I just installed Ubuntu 13.04 on my Lenovo g580.
When running pm-suspend or closing the lid, the laptop suspends just fine. However when I re-open the lid or press a button, it wakes up (fans start running), the screen remains all black (no mouse pointer or anything) and I am forced to reboot.
Sometimes I can hear a sound that I think is the ubuntu login prompt, suggesting that the laptop is running and that the problem is with the monitor.
I have no full-screen applications or external devices plugged in at the time of suspend.
How can I diagnose and fix this problem?
Here is a copy of my /var/log/syslog after a reboot after a failed suspend-wakeup: https://gist.github.com/anonymous/5690306