But there are no such volume meters in gnome-volume-control; didn't test
its "Input level" meter.

** Description changed:

- Switching active tab and mute and lock buttons is slow sometimes during
- playback.
+ During playback (or during input) the respective volume meters take a
+ lot of CPU via Xorg process, if such a meter is visible in pavucontrol's
+ user interface. When playing music, for instance, Xorg process will then
+ take about all available CPU power of AMD Athlon XP processor, that is
+ about 70% of CPU; pavucontrol itself takes only 3%.
+ 
+ VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX 420]
+ (rev a3), using the default free driver.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: pavucontrol 0.9.9-1
  ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
  Uname: Linux 2.6.38-11-generic i686
  Architecture: i386
  Date: Sun Aug 21 22:32:46 2011
  EcryptfsInUse: Yes
  InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release i386 (20110426.1)
  ProcEnviron:
-  LANGUAGE=en_US:en
-  PATH=(custom, no user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_US:en
+  PATH=(custom, no user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SourcePackage: pavucontrol
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/830677

Title:
  Volume meters take too much CPU

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