I have Windows 7 64 bit and when I boot up windows without headphones plugged in, the sound works fine through the speakers but when I plug in the headphones they do not work. If I unplug the headphones, the sound starts coming out of the speakers. I have tried manually switching devices but that didn't work either and if I try to adjust volume the sound mixer crashes.
I just have integrated audio (device manager lists it as High Definition Audio Device and IDT High Definition Audio CODEC).
If I plug in the headphones and then start the laptop, the sound works fine through the headphones.
Any info on what may be going on?