Bug 45956

Summary:	Slider inaccurately controlling output
Product:	PulseAudio	Reporter:	Matthew <bulletproof.snake>
Component:	misc	Assignee:	pulseaudio-bugs
Status:	RESOLVED WORKSFORME	QA Contact:	pulseaudio-bugs
Severity:	major
Priority:	medium	CC:	lennart
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Matthew 2012-02-12 10:10:19 UTC

Using F16, the volume controller only controls volume at the last 20% of the slider (i.e. at 80%, complete silence; 100%, full volume).

Comment 1 Tanu Kaskinen 2012-02-13 09:20:23 UTC

This is probably due to bad decibel information from the alsa kernel driver.

There's probably a line like this in /etc/pulse/default.pa:

    load-module module-udev-detect

If you add "ignore_dB=yes" so that the line becomes

    load-module module-udev-detect ignore_dB=yes

does the volume start to work better (after rebooting or restarting pulseaudio)?

Comment 2 Matthew 2012-02-13 12:17:03 UTC

That appears to definitely have helped it. Now it's more like the last 66% are in control.

Comment 3 Tanu Kaskinen 2012-02-15 09:03:51 UTC

See http://pulseaudio.org/wiki/BadDecibel

Comment 4 Matthew 2012-02-15 10:00:23 UTC

Thanks for your help, Tanu.

Comment 5 Tanu Kaskinen 2012-02-15 10:08:50 UTC

Out of interest, did you settle with the "ignore_dB" workaround, or did you file a bug somewhere as instructed on that wiki page? If it's the decibel information is wrong for you, it will be wrong for everybody with the same hardware.

Comment 6 Matthew 2012-02-15 10:11:41 UTC

I settled with ignore_db. It works a lot better than it did before, and I'm fine with that.


Now I have to figure out why my volume up / down / play / pause / forward / backward / brightness buttons fail halfway through the session and Software Update continuously fails.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.