On Thu, 04 Jan 2018 17:27:55 +0100, Freaky wrote:

Hi Takashi,

we need it to get the headphone output working. Upon unplugging / replugging we need to check them again (they remain checked, but the output stops working). The speaker output (onboard speakers) works fine and the script we run doesn't appear to have any effect on the speaker output at all.

The alsa-info.sh output showed that GPIO[1] is also set, so I wonder how and who sets it. In anyway, could you check whether flipping any such gpio bits turn on / off the headphone and the speaker outputs? Try to toggle it while playing back, such as, hda-verb /dev/snd/hwC1D0 0x01 SET_GPIO_DATA xxx where xxx is the value to be written (0x00, 0x02, 0x04, 0x06, etc).

Currently use a python script generated by the HDA Analyzer script that we run every 5 seconds from boot. Pasted the script below. We run it every 5 seconds to ensure audio will work after replugging the headphones (although it might incur a small delay then of course). I don't notice any hick-ups in audio playback because of the script firing every 5 seconds.

There's no acpid running from which we could detect the plug event. Using a system based on Fedora 24. Have watched dbus-monitor (--sytem), but see no events there upon (un)plugging the headphones which we could use as trigger.

The headphone jack detection on HD-audio is usually done via HD-audio codec unsolicited events. You can check "Headphone Jack" ALSA control element (e.g. watch the output of "amixer contents").

Takashi