Here are the output of the above hda-verb commands.
arun@arunpc:~$ sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x40 [sudo] password for arun: nid = 0x20, verb = 0x500, param = 0x40 value = 0x0 arun@arunpc:~$ sudo hda-verb /dev/snd/hwC0D0 0x20 GET_PROC_COEF 0 nid = 0x20, verb = 0xc00, param = 0x0 value = 0x420
This didn't solve either.
Here are the output of the above hda-verb commands.
arun@arunpc:~$ sudo hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x40
[sudo] password for arun:
nid = 0x20, verb = 0x500, param = 0x40
value = 0x0
arun@arunpc:~$ sudo hda-verb /dev/snd/hwC0D0 0x20 GET_PROC_COEF 0
nid = 0x20, verb = 0xc00, param = 0x0
value = 0x420
This didn't solve either.