Comment 8 for bug 1805079

Hi Hui Wang,

While waiting for your patch to reach the mainline, I just insert these two lines myself.

However, I still have issues with the sound.

Scenario: laptop is off, headphones are inserted, sound (both mic and output) is muted; I turn it on, log in etc., unmute the output and play something.

The sound is often too quiet (maybe 10 to 15 dB weaker than expected). If I unplug the headphones and plug them back in, the sound level rises to expected levels, but I start hearing noise reminiscent of cheap soundcards (with grounding problems?), where the noise characteristics change with the activity of other devices (e.g., mouse movements). The noise is stronger if I touch the touchpad. If I mute the sound, the noise disappears.

This does not happen if I remove the "0x12" line, whether or not I add the .chained/.chain_id lines. Interestingly, init_pin_configs in sysfs shows the same value for 0x12:

$ cat /sys/class/sound/hwC0D0/init_pin_configs
0x12 0x90a60130
0x13 0x40000000
0x14 0x90170110
0x16 0x411111f0
0x17 0x411111f0
0x18 0x411111f0
0x19 0x04a11040
0x1a 0x411111f0
0x1b 0x411111f0
0x1d 0x40600001
0x1e 0x411111f0
0x21 0x04211020

(driver_pin_configs and user_pin_configs are empty.)

Thank you,
Vadim.