Try to install alsa dev package, then reconfigure and recompile freeswitch.
In ubuntu package name is libasound2-dev.
Some more info here: http://portaudio.com/docs/v19-doxydocs/compile_linux.html
Question
i am using freeswitch for a VOIP application. after loading mod_portaudio, pa devlist results blank , pa call 9999 and pa call 9996 reasult mod_portaudio.c:2453 Error invalid output audio device. . Can anyone please help me why these errors are coming. Thanks in advance.
Solution
Try to install alsa dev package, then reconfigure and recompile freeswitch.
In ubuntu package name is libasound2-dev.
Some more info here: http://portaudio.com/docs/v19-doxydocs/compile_linux.html