Arch Linux

Please read this before reporting a bug:
https://wiki.archlinux.org/title/Bug_reporting_guidelines

Do NOT report bugs when a package is just outdated, or it is in the AUR. Use the 'flag out of date' link on the package page, or the Mailing List.

REPEAT: Do NOT report bugs for outdated packages!
Tasklist

FS#9737 - Bad sound quality when moving the mouse cursor

Attached to Project: Arch Linux
Opened by Byunghyun OH (octaphial) - Sunday, 02 March 2008, 11:49 GMT
Last edited by Greg (dolby) - Monday, 21 July 2008, 15:42 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Tobias Powalowski (tpowa)
Thomas Bächler (brain0)
Architecture i686
Severity Medium
Priority Normal
Reported Version 2007.08-2
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:
When playing any PCM sound, including FLAC/MP3/CD Audio/soft synthsizer/Skype/etc., I find the sound quality strangely changed (not a noise but I hear very well something like a buzz only for the moment of moving cursor). Downgrading the kernel to kernel26-2.26.22.9-1 make it disappear.

Additional info:
* package version(s)
kernel26-2.6.24.3-1
* config and/or log files etc.
Nothing touched, no log exists for this problem.
* hardware
Compaq/HP nc4010, snd_ali5451 driver

Steps to reproduce:
Install the kernel mentioned above.
Play any PCM music with moving the mouse cursor.
It occurs both in X Window System and in console. In console no mouse cursor exists but it makes the same situation.
This task depends upon

Closed by  Greg (dolby)
Monday, 21 July 2008, 15:42 GMT
Reason for closing:  Upstream
Comment by Paul Bredbury (brebs) - Tuesday, 04 March 2008, 16:10 GMT
Try switching to ALSA 1.0.16
http://bbs.archlinux.org/viewtopic.php?id=44379
Comment by Byunghyun OH (octaphial) - Tuesday, 04 March 2008, 17:09 GMT
It didn't work. The sound still trembles when moving the mouse cursor.
Comment by Byunghyun OH (octaphial) - Saturday, 15 March 2008, 16:32 GMT
In kernel26-2.6.24.3-3 the bad effect becomes less important (endurable) but it still exists. What has been changed between these two revisions ?
Comment by Byunghyun OH (octaphial) - Saturday, 15 March 2008, 16:44 GMT
Exactly saying, the problem still exists and I can explain it better : the frequency of any sound goes down for every moment moving mouse cursor or doing heavy tasks ("find /", loading a heavy web page, etc.). Since "less frequency" means "overall slowdown" of the sound, I suspect a problem of something deep inside the kernel.
Comment by Paul Bredbury (brebs) - Sunday, 16 March 2008, 16:48 GMT
Try disabling CPU power-saving in the kernel, to see if it's caused by the CPU switching power-saving modes - see http://www.thinkwiki.org/wiki/Problem_with_high_pitch_noises
Comment by Byunghyun OH (octaphial) - Saturday, 22 March 2008, 17:11 GMT
It doesn't work. And it is not a noise, it is a deformation of sound.
Additionally, kernel26vanilla (in AUR) 2.6.23.12-1 works well. kernel26-ice (in AUR) 2.6.24-4 has again the same problem. So I suspect that some changes in 2.6.24 made this problem.
Comment by Byunghyun OH (octaphial) - Tuesday, 25 March 2008, 20:30 GMT
Well... As a final try, following the given document, I turned off 'processor' and 'thermal' modules and it finally works for kernel26-ice. Thus I think that it will work samely for the normal kernel26. I want to know what change into kernel made this annoying situation, but I guess that it is beyond my knowledge...
Comment by Byunghyun OH (octaphial) - Saturday, 03 May 2008, 21:29 GMT
I am testing new kernel 2.6.25.
- I notice that the problem is less serious, sometimes disappeared for Youtube, but I think that it is not only for 2.6.25 since it was the same on Ubuntu Hardy LiveCD (kernel 2.6.24.4).
- Also I observed that when I play something with mplayer and Youtube in the same time, suddenly the problem disappears on the both sound sources. I don't know whether it is by the chance or not, but it may mean something that I don't know...
Comment by Greg (dolby) - Saturday, 17 May 2008, 16:03 GMT
Please file a bug report upstream

Loading...