Red Hat Bugzilla – Bug 37495
Constant clicking in sound playback on Sony PCG-F480
Last modified: 2008-05-01 11:38:00 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
When playing sound with KDE through either XMMS or the KDE multimedia
player (or even the KDE startup sound) a constant clicking is heard.
Setting XMMS to OSS output plugin fixes this, but only for XMMS, doesn't
seem to be any way to fix it for the other KDE sound players.
Steps to Reproduce:
1.After a standard Red Hat install on Sony PCG-F480 (neomagic 256 chip)
try playing sounds or listen to the startup sound.
2. Try changing XMMS sound output plugin to oss
Actual Results: Normal playback contains a constant clicking sound.
Switching to OSS fixes this for XMMS but not for the rest of KDE.
Changing the buffering in the sound-server setup tool of KDE doesn't
improve the problem.
Expected Results: The sound playback should be without clicks.
This was observed after a standard "everything" install, no errors were
reported during boot or install.
If everything in KDE sounds this way, but switching to OSS for xmms works,
it sounds like an arts problem.
This is using the ymfpci driver, yes?g
Check the settings in KControl > Sound > Sound Server > Sound IO
For many Yamaha soundcards, you need to set the sampling rate to 48000, you
may also want to increase the audio buffer size.
During my initial tests I bumped up the buffer size and tried raising the
sampling rate to 48k using the KDE sound control panel. This didn't change the
As far as which sound driver (ymfpci) how do I tell which one is being used?
lsmod reports the following (so it looks like ymfpci is being used)
Module Size Used by
keybdev 2080 0 (unused)
usbkbd 3040 0 (unused)
ymfpci 42368 0 (autoclean)
uart401 6768 0 (autoclean) [ymfpci]
sound 62688 0 (autoclean) [uart401]
ac97_codec 8800 0 (autoclean) [ymfpci]
soundcore 4464 4 (autoclean) [ymfpci sound]
autofs 11264 2 (autoclean)
nfs 79008 1 (autoclean)
lockd 52464 1 (autoclean) [nfs]
sunrpc 61328 1 (autoclean) [nfs lockd]
3c574_cs 9552 1
ds 7280 2 [3c574_cs]
yenta_socket 11440 2
pcmcia_core 43072 0 [3c574_cs ds yenta_socket]
ipchains 38976 0 (unused)
nls_iso8859-1 2880 1 (autoclean)
nls_cp437 4384 1 (autoclean)
vfat 9392 1 (autoclean)
fat 32672 0 (autoclean) [vfat]
mousedev 4160 1
hid 11776 0 (unused)
input 3488 0 [keybdev usbkbd mousedev hid]
usb-uhci 20720 0 (unused)
usbcore 49664 1 [usbkbd hid usb-uhci]