no sound from internal mono channel on Aopen MiniPC

[John Cole]

Tim and everyone, 
 Well, the internal speaker is plugged into the motherboard, but I  don't know how to set the mixer to address it.  Here is the amixer  output on the system: 
 
Simple mixer control 'Master',0 
 Capabilities: pvolume pswitch pswitch-joined 
 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 'Master Mono',0 
 Capabilities: pvolume pvolume-joined pswitch pswitch-joined 
 Playback channels: Mono 
 Limits: Playback 0 - 31 
 Mono: Playback 31 [100%] [on] 
Simple mixer control 'PCM',0 
 Capabilities: pvolume pswitch pswitch-joined 
 Playback channels: Front Left - Front Right 
 Limits: Playback 0 - 31 
 Mono: 
 Front Left: Playback 30 [97%] [on] 
 Front Right: Playback 30 [97%] [on] 
Simple mixer control 'Surround',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 'Surround Jack Mode',0 
 Capabilities: enum 
 Items: 'Shared' 'Independent' 
 Item0: 'Shared' 
Simple mixer control 'Center',0 
 Capabilities: pvolume pvolume-joined pswitch pswitch-joined 
 Playback channels: Mono 
 Limits: Playback 0 - 31 
 Mono: Playback 31 [100%] [on] 
Simple mixer control 'LFE',0 
 Capabilities: pvolume pvolume-joined pswitch pswitch-joined 
 Playback channels: Mono 
 Limits: Playback 0 - 31 
 Mono: Playback 0 [0%] [off] 
Simple mixer control 'Line',0 
 Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive 
 Capture exclusive group: 0 
 Playback channels: Front Left - Front Right 
 Capture channels: Front Left - Front Right 
 Limits: Playback 0 - 31 
 Front Left: Playback 31 [100%] [on] Capture [off] 
 Front Right: Playback 31 [100%] [on] Capture [off] 
Simple mixer control 'CD',0 
 Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive 
 Capture exclusive group: 0 
 Playback channels: Front Left - Front Right 
 Capture channels: Front Left - Front Right 
 Limits: Playback 0 - 31 
 Front Left: Playback 30 [97%] [on] Capture [on] 
 Front Right: Playback 30 [97%] [on] Capture [on] 
Simple mixer control 'Mic',0 
 Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch  cswitch-exclusive 
 Capture exclusive group: 0 
 Playback channels: Mono 
 Capture channels: Front Left - Front Right 
 Limits: Playback 0 - 31 
 Mono: Playback 0 [0%] [off] 
 Front Left: Capture [off] 
 Front Right: Capture [off] 
Simple mixer control 'Mic Boost (+20dB)',0 
 Capabilities: pswitch pswitch-joined 
 Playback channels: Mono 
 Mono: Playback [off] 
Simple mixer control 'Mic Front Input',0 
 Capabilities: pswitch pswitch-joined 
 Playback channels: Mono 
 Mono: Playback [off] 
Simple mixer control 'Mic Select',0 
 Capabilities: enum 
 Items: 'Mic1' 'Mic2' 
 Item0: 'Mic1' 
Simple mixer control 'Video',0 
 Capabilities: cswitch cswitch-exclusive 
 Capture exclusive group: 0 
 Capture channels: Front Left - Front Right 
 Front Left: Capture [off] 
 Front Right: Capture [off] 
Simple mixer control 'Phone',0 
 Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch  cswitch-exclusive 
 Capture exclusive group: 0 
 Playback channels: Mono 
 Capture channels: Front Left - Front Right 
 Limits: Playback 0 - 31 
 Mono: Playback 31 [100%] [on] 
 Front Left: Capture [off] 
 Front Right: Capture [off] 
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 'IEC958 Playback AC97-SPSA',0 
 Capabilities: volume volume-joined 
 Playback channels: Mono 
 Capture channels: Mono 
 Limits: 0 - 3 
 Mono: 3 [100%] 
Simple mixer control 'IEC958 Playback Source',0 
 Capabilities: enum 
 Items: 'PCM' 'Analog In' 'IEC958 In' 
 Item0: 'PCM' 
Simple mixer control 'PC Speaker',0 
 Capabilities: pvolume pvolume-joined pswitch pswitch-joined 
 Playback channels: Mono 
 Limits: Playback 0 - 15 
 Mono: Playback 15 [100%] [on] 
Simple mixer control 'Aux',0 
 Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive 
 Capture exclusive group: 0 
 Playback channels: Front Left - Front Right 
 Capture channels: Front Left - Front Right 
 Limits: Playback 0 - 31 
 Front Left: Playback 31 [100%] [on] Capture [off] 
 Front Right: Playback 31 [100%] [on] Capture [off] 
Simple mixer control 'Mono Output Select',0 
 Capabilities: enum 
 Items: 'Mix' 'Mic' 
 Item0: 'Mix' 
Simple mixer control 'Capture',0 
 Capabilities: cvolume cswitch cswitch-joined 
 Capture channels: Front Left - Front Right 
 Limits: Capture 0 - 15 
 Front Left: Capture 15 [100%] [on] 
 Front Right: Capture 15 [100%] [on] 
Simple mixer control 'Mix',0 
 Capabilities: cswitch cswitch-exclusive 
 Capture exclusive group: 0 
 Capture channels: Front Left - Front Right 
 Front Left: Capture [off] 
 Front Right: Capture [off] 
Simple mixer control 'Mix Mono',0 
 Capabilities: cswitch cswitch-exclusive 
 Capture exclusive group: 0 
 Capture channels: Front Left - Front Right 
 Front Left: Capture [off] 
 Front Right: Capture [off] 
Simple mixer control 'Channel Mode',0 
 Capabilities: enum 
 Items: '2ch' '4ch' '6ch' 
 Item0: '2ch' 
Simple mixer control 'Duplicate Front',0 
 Capabilities: pswitch pswitch-joined 
 Playback channels: Mono 
 Mono: Playback [on] 
Simple mixer control 'External Amplifier',0 
 Capabilities: pswitch pswitch-joined 
 Playback channels: Mono 
 Mono: Playback [on] 
 
Perhaps this provides some clues for someone  :-)  
 
Thanks, 
 
John Cole 
 
Tim wrote: 
On Sun, 2006-02-26 at 11:23 -0800, John Cole wrote: 
     I'm trying to get the internal mono sound speaker to work on an 
Aopen MiniPC.  I get sound from the external jack but none from the 
internal speaker. 
 
  Scouring the web, I have performed the modprobe pcpskr and gotten it 
to appear in a lsmod after a reboot.  I have made sure it is not muted 
and the volume is up (among many other combinations  :-)  ) 
 
  The documentation seems to indicate that the internal speaker is a 
mono sound channel, so I don't know if it is supposed to use pcspkr or 
not. 
      
I don't know what the "mono" volume control does (I can't get any effect 
from it on my PCs).  If you want the PC speaker/beeper to sound off 
through the sound card, it'll need to be plugged into it somehow.  Some 
sound cards have a header to connect the PC speaker to it, and it's then 
controlled by a "speaker" volume control. 
 
I'm not so sure this is a good idea, though.  Most Linux things don't 
play with the speaker, if they produce a sound they play an audio file 
through the sound system.  The BIOS uses the beeper for important things 
like overheat or fan-stuck warnings, you really do want such alerts to 
be heard, not silenced by your audio mixer settings. 
 
   
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