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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Feature request: do not resample nor output sound with 0 usage"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103569">103569</a>
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<th>Summary</th>
<td>Feature request: do not resample nor output sound with 0 usage
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<th>Product</th>
<td>PulseAudio
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>daemon
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<th>Assignee</th>
<td>pulseaudio-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>Hi-Angel@yandex.ru
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<th>QA Contact</th>
<td>pulseaudio-bugs@lists.freedesktop.org
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<th>CC</th>
<td>lennart@poettering.net
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<p>
<div>
<pre># Steps to reproduce:
1. Run a soundtrack in VLC
2. Disable sound in VLC, or alternatively lower it to 0
3. Run `top`, and check CPU-load of pulseaudio
# Expected results:
You should see almost the same usage as if pulseaudio was idle
# Actual results:
Pulseaudio loads CPU around ≈4-5%.
# Real-world significancy:
Initially I found the problem for figuring out why pulseaudio loads CPU to 10%
(not even 5% as with VLC!) when I ain't play anything. Pavucontrol shows that
no apps are using sound. Long story short, I went as far as to disable
pulseaudio, and then noted something funny in `top`: one Qutebrowser tab been
loading my CPU to 2-3%. I immediately figured it out: it's a crappy
"freelancer.com" site, no surprise. After it's closed, the again enabled
pulseudio does not load my CPU anymore.
I think they maybe play some static noise at 0 sound. Pulseaudio surely can
detect it, because I do not see at pavucontrol's "audio usage" line any jumps.
Other applications: speech-dispatcher streams might be doing something alike
<a href="https://bbs.archlinux.org/viewtopic.php?id=222857">https://bbs.archlinux.org/viewtopic.php?id=222857</a>
I also found this Ubuntu bug
<a href="https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/207135">https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/207135</a> despite tagged
"fix released", peoples keep complaining. My guess it might be related.</pre>
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