I upgraded from 14.10 to 15.04 I have dual monitor setup. When I put my system to sleep, one of the monitor remain on but screen in black. If I try to wake the system up using my keyboard it doesn't wake up. Pressing the power button doesn't help either. So I have to force a hard reboot. Reproducible: Always Steps to Reproduce: 1. put system to sleep 2. try to wake it up using keyboard 3. try to wake it up by pressing the power button Actual Results: remain in sleep more Expected Results: should wake and allow me to login
OK I tired it again and it seems like things are working correctly. The only thing I changed was un-select 'button events handing' from power management system setting.