Message after message after message on these forums documents the problems with using Standby and Hibernate on desktop systems.  Yes, it should work.  But, there are too many possible conflicts to easily figure out what goes wrong.  Producers of desktop hardware, devices, and device drivers do not take as much care with making sure that they all work with standby on desktop computers.  Why?  Because these modes are not necessary on desktops.  You can spend the next few thousand hours of your time trying to figure out where the conflict is, or you take the advice given time after time after time on these forums to not use standby or hibernate on desktop systems, but instead use the power savings options to turn off the hard drive and monitor after a specified period of time.  It's your choice and your time.

Steve