Bug 102462

Summary:	pavucontrol - volume levels always zero
Product:	PulseAudio	Reporter:	quantumphoton007
Component:	pavucontrol	Assignee:	pulseaudio-bugs
Status:	RESOLVED NOTABUG	QA Contact:	pulseaudio-bugs
Severity:	normal
Priority:	medium	CC:	lennart, quantumphoton007
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	The sound level bar that always stays zero

Description quantumphoton007 2017-08-28 20:40:54 UTC

Created attachment 133854 [details]
The sound level bar that always stays zero

pavucontrol's volume levels are always zero, no matter how loud my audio playback is. It is zero in both playback and output-devices tabs.

In an attempt to debug, I cloned the latest version from git, printed the values to see where the issue is.

> v = ((const float*)data)[length / sizeof(float) - 1];
> fprintf(stderr, "%lf\n", v);

in mainwindow.cc

The output always stays zero. The only exception is the input devices tab, where the sound levels work as expected for my microphone. When I print the values from input devices section, the value is some non-zero float.

Comment 1 quantumphoton007 2017-08-28 20:50:05 UTC

I looked for all values returned by `pa_stream_set_read_callback` that are non zero (inside MainWindow::createMonitorStreamForSource).

Every value that is in the array turns out to be 0.

Could this be a bug on pulseaudio's implementation of `pa_stream_set_read_callback`? 

I do remember the sound level working, not long ago.

Comment 2 quantumphoton007 2017-08-29 09:45:12 UTC

My bad. The monitor of built-in analog stereo was muted in pavucontrol. Unmuting it fixed it.

Sorry for the trouble.

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.