[Alsa-user] "amixer toggle" toggles only one channel...

[<ir...@cs...>]

Hi there,

I have a problem with the amixer tool.

For a given mixer, I was used to being able to set both
channels seperately in their Volume and mute, unmute,
toggle them seperately, too.

On my Laptop I was able to do something like this:

---------- snip ----------
tody:~ # amixer set Master 10,20
Simple mixer control 'Master',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Front Left: Playback 10 [32%] [on]
  Front Right: Playback 20 [65%] [on]
---------- snap ----------

or like this:

---------- snip ----------
tody:~ # amixer set Master unmute,toggle
Simple mixer control 'Master',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Front Left: Playback 10 [32%] [on]
  Front Right: Playback 20 [65%] [off]

tody:~ # amixer set Master toggle,toggle
Simple mixer control 'Master',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Front Left: Playback 10 [32%] [off]
  Front Right: Playback 20 [65%] [on]
---------- snap ----------


On my new PC, however, the above commands make
amixer complaining. Using one parameter only
for the volume works well:

---------- snip ----------
linux:~ # amixer set Front 3
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 3 [10%] [on]
  Front Right: Playback 3 [10%] [on]
---------- snap ----------

Using the mute command as a single parameter
works well, too.

Using the toggle command, however, produces
the following message:
---------- snip ----------
linux:~ # amixer set Front toggle
amixer: Unknown capture setup 'toggle'..
---------- snap ----------

An "amixer get Front" tells me now, that
the toggle was performed, but only for
the left channel:

---------- snip ----------
linux:~ # amixer get Front
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 3 [10%] [off]
  Front Right: Playback 3 [10%] [on]
---------- snap ----------


Trying to set the volumes for both channels
seperately works, but I'm also getting an
error message:

---------- snip ----------
linux:~ # amixer set Front 10,15
amixer: Unknown capture setup ''..

linux:~ # amixer get Front toggle
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 10 [32%] [off]
  Front Right: Playback 15 [48%] [on]
---------- snap ----------

However, using "toggle" twice as a parameter
also only toggles the left Volume. The only
thing that is different, is the error message:

---------- snip ----------
linux:~ # amixer set Front toggle,toggle
amixer: Unknown capture setup 'toggle,toggle'..

linux:~ # amixer get Front
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 10 [32%] [on]
  Front Right: Playback 15 [48%] [on]
---------- snap ----------

However, muting the left channel while still
toggeling the right, works (- besides an
error message):

---------- snip ----------
linux:~ # amixer set Front unmute,toggle
amixer: Unknown capture setup 'toggle'..

linux:~ # amixer get Front
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 10 [32%] [on]
  Front Right: Playback 15 [48%] [off]
---------- snap ----------




What am I doing wrong?!  (Apart from writing
such long emails...)

Isn't it possible to toggle both channels at
one time?! And why do I always have this
"Mono:" channel listed although it is not
part of the "Playback channels:" ?!

Thanks for any help...

P.S.: On my Laptop, I'm using a SuSE 9.3 with
2.6.11.4-20a-default kernel and the following
rpms:
- alsa-1.0.9-9.1:
- alsa-firmware-1.0.8-5:
- alsamixergui-0.9.0rc1-544
- alsaplayer-0.99.76-72.1:
- alsa-tools-1.0.8-4:
- alsamodular-1.8.7-5:
- alsa-devel-1.0.9-9.1:

On my new PC, I'm using a SuSE 10.0 with a
2.6.13-15.8-smp kernel and the following rpms:
- alsa-1.0.9-23:
- alsa-firmware-1.0.9-4:
- alsamixergui-0.9.0rc1-546:
- alsa-devel-1.0.9-23:
- alsa-tools-1.0.9-6: