New answers tagged headphones
Open a terminal and type in alsamixer. There make sure that headphones are unmuted.
Quoting a suggestion... Your DDX does not work with your current kernel and/or libdrm. There are at least three possible reasons for this: the nouveau DRM kernel module is not loaded, a version mismatch between the Nouveau DRM and libdrm, or KMS being disabled. First check, that lsmod command lists nouveau. If not, do modprobe nouveau to load the nouveau ...
Running alsamixer in terminal worked for me, set it to Auto Mute and you should find your machine will play sound through one or the other rather than both
You have to turn off your headphones, and then hold the power button for about 6-7 seconds until the light starts blinking red and blue. Then your headphones will be visible for the laptop.
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