http://qa.mandrakesoft.com/show_bug.cgi?id=4344
------- Additional Comments From [EMAIL PROTECTED] 2003-28-07 02:01 -------
Thanks for the clarification. I confirmed that pressing "m" alternately mutes
and unmutes the channel. Basically, the muting option is like a digital 1/0
value which is multiplied with the actual value of the channel. Obviously,
anything multiplied with zero is zero.
The problem lies elsewhere. Kmix has buttons for muting which are very visible
and obvious. I have also seen cases where kmix automatically sets the value of
a channel to zero if it is muted. Aumix also does the same. But alsamixer
obviously does differently. Given different mixers (kmix, gmix, aumix, xmix,
alsamixer) follow different protocols, its hard to know which is doing what.
Now, whatever be the "correct" behavior, the problem with alsamixer is that it
does not say anything about pressing "m" (even though it says to press "esc" to
quit) after it is started in a terminal. This is a design flaw. Adding a few
more help lines like:
Press "m" to toggle muting for the current channel
would avoid such trouble. Note that the terminal version of aumix does a much
better job and lists a set of keys needed to perform the basic functions of a
mixer.
Running "man alsamixer" and learning from it should be a last resort, not the
first necessity in the GUI desktop world.
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description:
I am using the ALSA driver "snd-via82xx" and have these rpms:
libalsa-data-0.9.5-1mdk
libalsa2-0.9.5-1mdk
alsa-utils-0.9.5-1mdk
At boot, the driver's channels are all mutes (at zero). Now, if alsamixer is
used to unmute them (set non-zero values), it has no effect since no sound can
be heard even if alsamixer shows 100 for PCM and Master. However, if some other
mixer (such as aumix) is used to unmute the sound channels to any non-zero
values, alsamixer starts working fine. In brief, alsamixer cannot increase the
volume (Master and PCM channels) if it starts from zero. This is a serious
problem since after booting the ALSA drivers are muted and therefore it is
impossible to get sound using alsamixer.
