I have an HP Envy DV7T laptop with Windows 8.0 installed.
On occasion (about 50% of the time) I have trouble getting any audio out of my speakers. This seems to be a software or driver issue. When the sound works, changing the volume gives an audible "ding," and you can see the little green bar move on the volume bar indicating But when the sound doesn't work, changing the volume does not give an audible ding. This is how I know that it's not an application specific issue.
The only error messages I've been able to get are when trying to play audio through Windows Media Player.
Playing a file (any file) when the sound doesn't work will give me an error that "Windows Media Player encountered a problem while playing the file." Clicking the "Web Help" button takes me to this link:
Also, when I use the Windows 8 version of Windows Media Player ("Windows 8 Music") to play a file I get two error codes: 0xc00d11cd (0x8000ffff) and also 0xc00d11cd (0x4). When I google these error codes, I find a lot of solutions (like this one
) suggesting I change the DisableProtectedAudioDG registry key from 1 to 0 (or delete the key altogether). I have done this (changed it to 0) and restarted, but it had no effect.
I have checked for updated drivers, and I confirmed that I have the latest audio drivers for my laptop. I also reinstalled the audio drivers.
I also installed AC3 Filter (http://www.ac3filter.net/wiki/Projects/ac3filter
). I don't really understand what this does, but one of the forums I read said to give it a try. It didn't help.
Doing some things will usually cause the sound to work. For example, I can usually go into the Sound Settings, Speaker Properties, Advanced Tab and press the "Test" button which will frequently get the sound working for a little while.
I have tried checking/unchecking the "Allow applications to take exclusive control of this device" setting, and it seems to have no effect (though sometimes it does make the sound work for a little while.)
I'm not sure what else to try. Changing various sound settings does seem to make it work for a bit, but then it will stop working for some reason.
I'd appreciate any ideas on how to diagnose / resolve this issue. Thanks!