Win HOW TO - Fix Loss of HDMI Audio After Resume from Sleep Using an EDID Override
#4
6. THE HDMI PIN 19 TRICK

I'm not sure if this is urban legend or real science, but an alternative way to address lost audio devices is by modifying the end of your HDMI cable. Pin 19 is the Hot Plug Detect — the plug that monitors when devices are powered on or off, or when they are connected or disconnected. By blocking this pin with electrical tape, you may be able to keep your devices alive in all power states.

Background: Inside an HDMI cable

If you are more electrician than computer scientist, this poster may be of greater help (Note: This method is untested):

Blocking HDMI Hot Plug Detection (aka Pin 19)
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HOW TO - Fix Loss of HDMI Audio After Resume from Sleep Using EDID Override - by Warner306 - 2015-12-13, 07:02


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