excessive CPU use
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
pulseaudio (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: rhythmbox
When playing a song streamed by Firefly on a local server, Pulsaudio uses about 30% CPU and Rhythmbox uses about 30%. This CPU usage behaviour does not occur under the 8.10 version of Ubuntu. Additionally, if I play a stream from last.fm, Pulseaudio goes to almost 100% CPU and the audio is badly broken up.
I am reporting the Pulsaudio problem here as it may be the root cause.
If it is not already captured by apport:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu jaunty (development branch)
Release: 9.04
Codename: jaunty
kpratt@balrog:~$
Linux balrog 2.6.28-8-generic #24-Ubuntu SMP Wed Feb 18 18:48:55 UTC 2009 i686 GNU/Linux
Installed on a Pentium D HP media Center PC m7160n with 4 Gig mem.
ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/rhythmbox
NonfreeKernelMo
Package: rhythmbox 0.11.6svn200902
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: rhythmbox
Uname: Linux 2.6.28-8-generic i686
In my case, pulseaudio does not segfault. I'm not sure this is a duplicate of 330814. pulseaudio consumes too much CPU and playback is choppy. I've also noticed that playback from mythtv is choppy - both audio and video. Very reminiscent of IRQ conflicts leading to lost interrupts back in the old day of manual IRQ setting. It is as if a DMA buffer is not getting transferred.