Hibernate=No sound

[jeller]

I've been hibernating my PC for months, as it the most useful and convenient option for me. But recently, every time I Hibernate my PC and revive it, I lose all sound. My speakers are plugged in fine, all the options are set to high...And it's obviously not one of those simple problems, as it has happened many times. After I restart my computer, sound returns.

Any ideas?
Thanks.