Pulseaudio volume control app takes 100% cpu

[Stephen Wassell]

Binary package hint: pavucontrol

Everything else appears fine, it just takes 100% cpu while open. Closing it fixes the problem. This is always reproducible.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: pavucontrol 0.9.9-1
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
NonfreeKernelModules: talpa_vfshook talpa_pedconnector talpa_pedevice talpa_vcdevice talpa_core talpa_linux talpa_syscallhook wl fglrx
Architecture: amd64
Date: Mon Oct 25 22:54:10 2010
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: pavucontrol

[Stephen Wassell (steve-nerv)]

AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfc500000 irq 46'
   Mixer name : 'IDT 92HD73C1X5'
   Components : 'HDA:111d7675,102802a0,00100103'
   Controls : 16
   Simple ctrls : 10
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfc010000 irq 47'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100000'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Card2.Amixer.info:
 Card hw:2 'default'/'Burr-Brown from TI USB Audio CODEC at usb-0000:00:1d.7-3.3, full'
   Mixer name : 'USB Mixer'
   Components : 'USB08bb:2902'
   Controls : 2
   Simple ctrls : 1
Date: Fri Oct 22 20:43:47 2010
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
SelectedCard: 2 default USB-Audio - USB Audio CODEC

UserAsoundrc:
 # ALSA library configuration file

 # Include settings that are under the control of asoundconf(1).
 # (To disable these settings, comment out this line.)
 </home/steve/.asoundrc.asoundconf>
dmi.bios.date: 02/11/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0P786H
dmi.board.vendor: Dell Inc.
dmi.board.version: A05
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A05
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd02/11/2009:svnDellInc.:pnStudio1737:pvrA05:rvnDellInc.:rn0P786H:rvrA05:cvnDellInc.:ct8:cvrA05:
dmi.product.name: Studio 1737
dmi.product.version: A05
dmi.sys.vendor: Dell Inc.

[Per Ångström (autark)]

I can see a clear rise in CPU usage when I have pauvcontrol's "Input Devices" tab open. The rise is due to pavucontrol and especially Xorg taking more CPU, but not more than some 10 %. I think it's the drawing of the input level that causes that. However, selecting a less busy tab lowers the CPU usage again to around 1 - 2 % (which I still think is excessive).

[Jarno Suni (jarnos)]

I can't reproduce this, but as for #3, please see Bug #830677.