求助，Debian KDE 环境下无法发出声音

Supertown

KDE桌面环境
Mplayer，xmmx等播放器都没有声音。
但进入Debian系统的声音，还有切换时的biba-bibu的声音，都可以听到。Gnome下则不存在这个问题。。。

LumaQQ的Error

0 [Sound] ERROR edu.tsinghua.lumaqq.Sounder - Audio Device Unavailable


MPlayer给出的信息

MPlayer 1.0pre8-3.3.5 (C) 2000-2006 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (Family: 15, Model: 2, Stepping: 9)
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2

Linux RTC init error in ioctl (rtc_irqp_set 1024): Invalid argument
Try adding "echo 1024 > /proc/sys/dev/rtc/max-user-freq" to your system startup scripts.

Playing /mnt/fat32/Home/pukka-tdctcra.avi.
AVI file format detected.
VIDEO: [XVID] 624x288 12bpp 25.000 fps 1087.4 kbps (132.7 kbyte/s)
Clip info:
Software: Nandub v1.0rc2
SUB: Could not determine file format
Cannot load subtitles: /mnt/fat32/Home/pukka-tdctcra.sub
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
[AO OSS] audio_setup: Can't open audio device /dev/dsp: Device or resource busy
AO: [null] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 624 x 288 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 2.17:1 - prescaling to correct movie aspect.
VO: [xv] 624x288 => 624x288 Planar YV12
New_Face failed. Maybe the font path is wrong. 1 ??% ??% ??,?%
Please supply the text font file (~/.mplayer/subfont.ttf).
subtitle font: load_sub_face failed.

Supertown

原来是KDE的sound system老占资源，把它关闭就可以了。

不过少了系统的音效，丢卒保车了。