Re: sound problem with g4 pb and selfmade 2.6.12
> hy there,
> i'm having a 12" g4 1ghz powerbook here with debian 3.1 installed
> (selfmade 2.6.12 kernel). unfortunately there seems to be a problem with
> the sound. no matter if i am in gnome or on the console (system)sounds
> are first at normal volume and then very quite. it is a bit difficult to
> explain - especially because i am not a native english speaker - so i
> make an example:
> - on gnome i have activated the sound-server and all sound events
> - of course also the volume is set to 100% at the gnome volume applet
> - when i now open a terminal and press p.ex. 5 times the backspace
> button the first sound issued by the speakers is at the volume level i
> expect and the latter 4 are so quiet that i nearly cannot hear them
> - if i now wait p.ex. 5 seconds and repeat this, again the first sound
> is loud and the others are quiet again
> - the same problem occurs also with other sounds (like when playing dvds
> - in the kernel config i have activated CONFIG_SOUND=m,
> CONFIG_DMASOUND_PMAC=m and CONFIG_DMASOUND=m as well as
> has anybody a hint on how to track this problem down and what might be
> the reason of it?
> thanks and greetings
Beeing a Powerbook user myself too I recognized the problem very well.
Actually, the topic was beeing discussed in Februar starting with
but the information is a little scattered there, so here it is once again
in a slightly differend form.
amixer is a programme which belongs to the alsa-utils package. Executing
the command `amixer contents | grep -A 2 DRC' gave by me the following
That means the dynamic volume range control is switched on and it tries
to keep the volume down. Simply switching off the silly thing solves the
problem. If the `numid' value is like above
$ amixer cset numid=12 off
is everything that is needed. If the settings are gone next time you boot,
make the settings you prefer permanent by giving the command
# alsactl store
which writes the current settings in the file /var/lib/alsa/asound.state.
Running dpkg-reconfigure and choosing `autosave' is an alternative which
should behave a bit differently, as the word suggests.
I suppose not very many people are happy with these defaults. I wonder
where they might come from?