Hi everybody,
I have the same problem with my Realtek Audio card and ACER 3680
To solve when the PC is booted ... plug in the headphones and keep them plugged in ...
Go to control panel => system => hardware=> device manager ...
under sound,video and game controlers ... uninstall the Realtek High definition Audio card ... wait a few secs ... and with the Action tab do a scan for hardware changes ... the realtek audio card re-installs itself and is re-initialised.
