Tenho placa-mãe PCI Quarteto infra-sônico e uso o Ubuntu 13.04.
O cartão tem 2 saídas estéreo analógicas. Eu uso as duas saídas para conectar meus fones de ouvido e alto-falantes uns aos outros.
Mas de repente eu não consigo gerenciar as saídas com alsamixer: eu posso silenciar somente a saída 1/2.
Saída 3/4 é sempre "On" tudo o que eu mudo no Alsamixer.
Aqui está meu / proc / asound / cards:
0 [HDMI ]: HDA-Intel - HDA ATI HDMI
HDA ATI HDMI at 0xf7e60000 irq 45
1 [Quartet ]: ICE1724 - Infrasonic Quartet
Infrasonic Quartet at 0xc080, irq 18
Alguém pode me dizer como fazer o alsamixer gerenciar os dois produtos?
UPDATE.
Aqui está a saída amixer -c 1 scontents :
Simple mixer control 'Master',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
Playback channels: Mono
Limits: Playback 0 - 255
Mono: Playback 249 [98%] [61.00dB] [on]
Simple mixer control 'PCM 1/2',0
Capabilities: pvolume cvolume penum
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 255 Capture 0 - 164
Front Left: Playback 165 [65%] [-3.78dB] Capture 155 [95%] [14.00dB]
Front Right: Playback 165 [65%] [-3.78dB] Capture 155 [95%] [14.00dB]
Simple mixer control 'PCM 3/4',0
Capabilities: pvolume cvolume penum
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 255 Capture 0 - 164
Front Left: Playback 169 [66%] [-3.57dB] Capture 155 [95%] [14.00dB]
Front Right: Playback 169 [66%] [-3.57dB] Capture 155 [95%] [14.00dB]
Simple mixer control 'PCM In 1/2',0
Capabilities: cenum
Items: 'An In 1/2' 'An In 3/4'
Item0: 'An In 1/2'
Simple mixer control 'PCM In 3/4',0
Capabilities: cenum
Items: 'An In 3/4' 'IEC958 In'
Item0: 'An In 3/4'
Simple mixer control 'IEC958',0
Capabilities: penum
Items: 'PCM Out' 'H/W In 0' 'H/W In 1' 'IEC958 In L' 'IEC958 In R'
Item0: 'PCM Out'
Simple mixer control 'IEC958 Output',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'IEC958',1
Capabilities: penum
Items: 'PCM Out' 'H/W In 0' 'H/W In 1' 'IEC958 In L' 'IEC958 In R'
Item0: 'PCM Out'
Simple mixer control 'Analog In 1/2',0
Capabilities: cenum
Items: 'Line In 1/2' 'Mic' 'Mic + Low-cut'
Item0: 'Line In 1/2'
Simple mixer control 'Analog In 1/2 to Monitor 1/2',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Analog In 1/2 to Monitor 3/4',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Analog In 3/4',0
Capabilities: cenum
Items: 'Line In 3/4' 'Hi-Z'
Item0: 'Line In 3/4'
Simple mixer control 'Analog In 3/4 to Monitor 1/2',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Analog In 3/4 to Monitor 3/4',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Coax Output Source',0
Capabilities: enum
Items: 'IEC958' 'I2S'
Item0: 'IEC958'
Simple mixer control 'H/W',0
Capabilities: penum
Items: 'PCM Out' 'H/W In 0' 'H/W In 1' 'IEC958 In L' 'IEC958 In R'
Item0: 'PCM Out'
Simple mixer control 'H/W',1
Capabilities: penum
Items: 'PCM Out' 'H/W In 0' 'H/W In 1' 'IEC958 In L' 'IEC958 In R'
Item0: 'PCM Out'
Simple mixer control 'Multi Track Internal Clock',0
Capabilities: enum
Items: '44100' '48000' '88200' '96000' '176400' '192000' 'IEC958 In' 'Word Clock 1xFS' 'Word Clock 256xFS'
Item0: '44100'
Simple mixer control 'Multi Track Rate Locking',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Multi Track Rate Reset',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Output 1/2 to Monitor 3/4',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Output 3/4 to Monitor 1/2',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Phantom Power',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Alguém poderia explicar o que esta saída significa? Por que os canais de reprodução são mono?
Aqui está a minha captura de tela do alsamixer:
A saída 3/4 está desativada, mas as duas saídas estão tocando agora. E eu não posso desligá-lo.