http://bugzilla.novell.com/show_bug.cgi?id=461361
User wiki.melancholie@web.de added comment
http://bugzilla.novell.com/show_bug.cgi?id=461361#c15
Wiki Melancholie changed:
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CC| |wiki.melancholie@web.de
--- Comment #15 from Wiki Melancholie 2009-06-10 16:14:40 MDT ---
I am having this very serious problem too, since an initial installation of
openSUSE 11.1 in May (fully updated).
With Master at 100% my sound card is clipping enormously (crackling because of
heavy distortion; it is way too loud, very very much too loud; even with Master
around 30% it still seems to clip a little bit) With Amarok, listening is
totally impossible e.g., the only player working properly is XMMS (using ALSA,
I think), all other players produce extreme crackling when using standard
volume, very harmful by the way.
Note that adjusting the PCM volume doesn't really have much effect (a little
bit if at 0%). The solution is to minimize the Master Volume, at least for me!
When setting the Master volume to max. 30%, although having PCM at 100%, the
sound is fine, I am using 0% (yes, 0%, and there is sound (that is the weird
thing, something is wrongly amplified (on the software side), signal gets
overamplified!); 0% are a little bit too low (sounds like as if I would had set
volume to 20-30% on my former PCLinuxOS system (it was clipping too above ~75%,
btw)), but this doesn't destroy hardware)
My workarounding solution:
Turn all output and input quiet, except those that you need; e.g. PCM=100% and
Master=20%.
But now things have become worse with PuleAudio 0.9.15-1.3, because volume
adjustments suddenly get lost on reboot and get (re-)set to those *fatal* 100%,
see
https://bugzilla.novell.com/show_bug.cgi?id=502604#c11
So, this bug now is going to damage my audio equipment over time...
My specs:
See http://www.smolts.org/client/show/pub_5fe28ef2-ec4f-4cb6-b03d-7c924a8cde1e
L Kernel: 2.6.27.23-0.1-default (i686)
L VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (snd_via82xx)
L PuleAudio 0.9.15-1.3
----
Note that there is launchpad ticket stating that this kind of problem may not
be related to PulseAudio:
* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/285866
Please see also:
* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/359361
* https://bugs.launchpad.net/ubuntu/+source/linux/+bug/284947 (lowering
standard volume for the VIA 8235 chipset would be nice too, if this issue were
going to be a permanent bug; will not hope so ;-)
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