No hdmi input after hibernation

Hi guys!
I have been letting my computer run all the time and just hibernate at night when I'm not using it. But when I come back to it and hit the space bar or move the mouse to wake it up my monitor gives me a "No HDMI input" message and I have to turn off the power at the rear of the box and then turn it on and turn on my comperter again to get any picture. Is there some way I am not aware of to wake up the system from hibernating?
My short term solution is to turn off my computer everytime I leave it for any period of time - and hope that this works. Thanks in advance for any help!

I get this sometimes and I just turn off the monitor and turn it back on.