There is an issue with Firefox 1.5 running under Kubuntu - Flash Sound doesn’t work. The problem is that Firefox defaults to esd (Enlightened Sound Daemon) - the fix is to make it use Alsa (via arts).

First, remove esd:

sudo apt-get remove esound esound-clients


Now, restart firefox…

If this doesn’t do the trick for you, there are more things you can do;

sudo vi /etc/mozilla-firefox/mozilla-firefoxrc


Change to

FIREFOX_DSP="artsdsp"


OR

FIREFOX_DSP="none"


Also, make sure you have the alsa-oss wrapper installed:

sudo apt-get install alsa-oss


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