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I have several Chromebook 3 tablets with broken headphone jacks. I recently purchased 2 of the Ugreen USB Sound Card External Audio Adapter with 3.5mm Aux. I plugged the adapter into the Chromebook and headphones into the adapter but the sound continues to come from the built in speakers and not through the adapter. I tested the adapter/headphones combination on my desktop PC and it worked as it should, sound through the headphones and not the PC. Any ideas why it doesn’t work on the Chromebook? Is there some internal setting I need to change or ???
Most likely a driver issue. Chromebooks probably don’t support it. I’ve had very little luck with external devices on mine, as I’ve had issue with even getting storage devices to work. Good luck and sorry I couldn’t help more.