Owning the same device I can tell you that there is at least one workaround, though not persistent:
- Go to Sound Preferences, Output tab and select Analog Headphones
- Run alsamixer, unmute Front (m key) and make it 100% (pageup). Exit alsamixer (esc)
Plug and unplug the jack and it should be working now. Unfortunately, this is not persistent as I mentioned, every time pulseaudio quits (on logout or when it crashes), you'll have to unmute Front again.
Owning the same device I can tell you that there is at least one workaround, though not persistent:
- Go to Sound Preferences, Output tab and select Analog Headphones
- Run alsamixer, unmute Front (m key) and make it 100% (pageup). Exit alsamixer (esc)
Plug and unplug the jack and it should be working now. Unfortunately, this is not persistent as I mentioned, every time pulseaudio quits (on logout or when it crashes), you'll have to unmute Front again.