被Ubuntu 8.04的PulseAudio折磨好久了，終於在今天找到了最簡單，最完美的解決方案。

網上流行的解決方法：
方法1. 把軟體都改用pulseAudio輸出; 不支援PulseAudio的，就在ALSA中模擬一個channel到pulseAudio。（asound的修改）
參考http://ubuntuforums.org/showthread.php?p=4928900

方法2. 移除PulseAudio，轉回ALSA。
例如： sudo apt-get remove gstreamer0.10-pulseaudio
------------------------------------------------------------
我的特別解決辦法：(又更新了）

既然Ubuntu 8.04嘗試把所有軟體搬到PulseAudio上，那麼就讓已經在成功運行於PulseAudio的繼續基於PulseAudio。只支援ALSA的軟體，繼續使用ALSA。

方法--修改/etc/pulse/default.pa
sudo gedit /etc/pulse/default.pa

找到：
#load-module module-alsa-sink ...
改為
load-module module-alsa-sink device=dmix

找到:
load-module module-suspend-on-idle
改為
#load-module module-suspend-on-idle
(重新logout再login）

Optional:
找到: (解決錄音問題，如skype)
load-module module-hal-detect
改為:
#load-module module-hal-detect

這樣，通過使用dmix，PulseAudio就不會霸佔整個audio系統。PulseAudio將成為alsa的其中一個Mix Channel。然後，ALSA和PulseAudio便能很好地共存。以後都不再需要什麼libflashsupport for pulseaudio了。

*************************************
還有，安裝PulseAudio的控制器，好好享受PulseAudio的優勢吧~
sudo apt-get install padevchooser

示範：
SMplayer(ALSA), Skype(ALSA), Totem(PulseAudio), Rhythmbox(PulseAudio)混音：





Stuttering Audio Fix (bug #188226 and bug #190754)
PulseAudio appears to create stuttering audio issues on many systems, perhaps due to the default CPU scheduler in Hardy's shipping kernel 2.6.24-16-generic (bug #188226), buffering problems (bug #190754), or both combined. This information should hopefully solve or at least reduce these problems.

These settings are ideal for my audio card, an "Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)". They may not work as well for you, so try adjusting the fragment values if you have problems.

1. Make sure your system is up-to-date and you are using at least kernel 2.6.24-18-generic, as it provides important scheduler fixes to prevent PulseAudio skipping.

2. Add your user to the groups "pulse-access" and "pulse-rt":
Code:

$ sudo adduser $USER pulse-access
$ sudo adduser $USER pulse-rt

3. Edit "~/.pulse/daemon.conf":

Code:

$ gedit ~/.pulse/daemon.conf

Add the following lines to the end of the file, and save:

Code:

high-priority = yes
nice-level = -11
realtime-scheduling = yes
realtime-priority = 5
default-fragments = 8
default-fragment-size-msec = 5
resample-method = speex-float-0

Note 1: If you still notice stuttering, try modifying the fragment sizes marked in red.
Note 2: The resample method listed in blue will reduce CPU usage, potentially at the cost of some audio quality. Change back to "speex-float-3" if you don't care about higher CPU usage.

太棒了
解決了系統有播放音樂時　網頁flash無聲的問題

為啥我就改不得
改了smplayer從此失身

打錯:
失聲

killall pulseaudio之後，
pulseaudio -v 看看是否能找都什麼原因...

還是麻煩ellon大幫忙,
專家診斷比較快有結果,
我也好快些分享好處

改了之後變這樣：
sudo killall pulseaudio
pulseaudio: no process killed

sudo pulseaudio -v
出現紅字：
...
E: alsa-util.c: Error opening PCM device hw:0: Device or resource busy
E: module.c: Failed to load module "module-alsa-sink" (argument: "device_id=0 sink_name=alsa_output.pci_8086_2445_sound_card_0_alsa_playback_0"): initialization failed.
...
E: source.c: Assertion 'PA_SOURCE_OPENED(s->thread_info.state)' failed at pulsecore/source.c:278, function pa_source_post(). Aborting.
Aborted

改之前可以kill到process
也沒紅字出現
也不會 aborted

更新了dmix的使用方法

其實SMplayer的聲音輸出改成alsa應該就有聲音了

全新安裝的Ubuntu 8.04，再用apt-get安裝的smplayer本來就有聲音

flash裝完flash player10跟libflashXXX也有聲音，也可同時播放

為什麼會需要改設定

libflashsupport會造成fx無預警關閉...
不裝又會無法和使用pluseaudio的軟體同時發聲...

這篇很有用...謝謝...