Hello,
I am on an iMac ("*imac-20" model/pinconfig) with a Intel HD card with the SigmaTel STAC9221 codec. I have attached the inital codec info after modprobe. I am using Alsa HG. Setting the mux gain to a value > 20 (0x02 Amp-Out value) results a non-working microphone. Steps and codec diffs as follows:
1) initial - microphone working 2) Mux Gain = 10 - microphone working
Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0 - Amp-Out vals: [0x00 0x00] + Amp-Out vals: [0x01 0x01] Connection: 7 0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a
3) Mux Gain = 20 - microphone working
Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0 - Amp-Out vals: [0x01 0x01] + Amp-Out vals: [0x02 0x02] Connection: 7 0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a
4) Mux Gain = 30 - microphone not working
Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0 - Amp-Out vals: [0x02 0x02] + Amp-Out vals: [0x03 0x03] Connection: 7 0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a
4) Mux Gain = 40 - microphone not working
Node 0x12 [Audio Selector] wcaps 0x30010d: Stereo Amp-Out Amp-Out caps: ofs=0x00, nsteps=0x04, stepsize=0x27, mute=0 - Amp-Out vals: [0x03 0x03] + Amp-Out vals: [0x04 0x04] Connection: 7 0x0e 0x15 0x0f 0x0b* 0x0c 0x0d 0x0a
Regards