After upgrading from Fedora 9 to 10, suddenly every sound produced by my system has a very low volume, to the point that I had to crank up my speakers to full volume (something which I never had to do with Fedora 9) to hear music comfortably.
I made sure that "aumix" and "pavucontrol" are showing full volume.
I think the reason for this problem is as follows:
When I run "alsamixer" it shows that master volume is 100%. However, what it is showing is just the pulseaudio virtual card. What is actually happening is that this virtual card is sending data to pulseaudio which is sending its data to the *real* alsa card, but it seems that this real alsa card has its own volume setting and this volume setting is probably low and I have no way to control it!
I googled a bit and saw that people commonly report this bug, but the workaround they give (running "alsamixer -c 0" or "alsamixer -D hw:0" to set the volume in the real card, not the virtual one) doesn't work for me (it gives "alsamixer: function snd_mixer_load failed: Invalid argument").
If the low volume settings on the hardware alsa driver are indeed the culprit, I think that when Fedora is starting its virtual alsa driver, it should first make sure that the volume settings for the underlying real alsa are all set to 100%. I don't know why mine are (apparently) starting with a low volume.
Sounds like yet another defauult mixer initialization issue. Reaassigning to alsa-lib.
Please state which card you have.
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I'm still seeing this one under Fedora 11 so could somebody reopen it please.
with gnome-volume-control put sound in 150 % to workaround ,
Low Maximum volume still happens on Fedora 13