My alsamixer is missing PCM, Master and some other controls

"praveenya kumar" <praveenya.g@xxxxxxxxx> · Fri, 29 Aug 2008 10:54:11 +0530

Hai!

We work on customized linux distribution. We used our own gui to control volume. We used to change volume by command
amixer -c 0 set PCM 20%  like that. Recently we changed our sound card, we are using realtek hda ALC262. I enabled the support for this card by enabling intel hda options in kernel. Now amixer is working, sound is coming but there is one problem, the Gui which we used to control volume is not working because the amixer control PCM is not there. Instead of PCM the volume is controllable using Front control. When I saw output of amixer I did not see some important controls like PCM and Master, instead I find new controls like Front and Line. Why this happened? How to get PCM an Master and other controls, so that there would be no need to change my program to set volume. I am sending my amixer output  and oss_mixer file in proc.

amixer output:

Simple mixer control 'Front',0

Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 6 [19%] [on]
Front Right: Playback 6 [19%] [on]
Simple mixer control 'Front Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [off]
Front Right: Playback 0 [0%] [off]
Simple mixer control 'Front Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'Line',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 0 [0%] [on]
Front Right: Playback 0 [0%] [on]
Simple mixer control 'Mic',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [on]
Front Right: Playback 31 [100%] [on]
Simple mixer control 'Mic Boost',0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 3
Front Left: 0 [0%]
Front Right: 0 [0%]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined cswitch cswitch-joined
Playback channels: Mono
Capture channels: Mono
Mono: Playback [on] Capture [off]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 31
Front Left: Capture 0 [0%] [on]
Front Right: Capture 0 [0%] [on]
Simple mixer control 'Capture',1
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 31
Front Left: Capture 0 [0%] [on]
Front Right: Capture 0 [0%] [on]
Simple mixer control 'Capture',2
Capabilities: cvolume cswitch
Capture channels: Front Left - Front Right
Limits: Capture 0 - 31
Front Left: Capture 0 [0%] [on]
Front Right: Capture 0 [0%] [on]
Simple mixer control 'Input Source',0
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line'
Item0: 'Mic'
Simple mixer control 'Input Source',1
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line'
Item0: 'Mic'
Simple mixer control 'Input Source',2
Capabilities: enum
Items: 'Mic' 'Front Mic' 'Line'
Item0: 'Mic'

/proc/asound/card0/oss_mixer

VOLUME "Front" 0
BASS "" 0
TREBLE "" 0
SYNTH "" 0
PCM "" 0
SPEAKER "" 0
LINE "Line" 0
MIC "Mic" 0
CD "" 0
IMIX "" 0
ALTPCM "" 0
RECLEV "" 0
IGAIN "Capture" 0
OGAIN "" 0
LINE1 "" 0
LINE2 "" 0
LINE3 "" 0
DIGITAL1 "IEC958" 0
DIGITAL2 "" 0
DIGITAL3 "" 0
PHONEIN "" 0
PHONEOUT "" 0
VIDEO "" 0
RADIO "" 0
MONITOR "" 0

Advance thanks!
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