Comment # 50 on bug 1171492 from Takashi Iwai

(In reply to Gabriele Tettamanzi from comment #49)
> - headset mic not working, the execution of:
> 
> alsaucm -c chtmax98090 set _verb HiFi set _enadev HeadsetMic
> 
> gives the following error:
> 
> ALSA lib main.c:392:(execute_sequence) cdev is not equal for playback and
> capture!
> alsaucm: error failed to set _enadev=HeadsetMic: Invalid argument

Not clear yet, but could you try to just remove the line defining "CaptureCTL"
in HeadsetMic.conf?  This was carried from your modified config, but it might
be superfluous.