Hi Arun, I have downloaded pulseaudio from below link: <a href="http://freedesktop.org/software/pulseaudio/releases/pulseaudio-1.99.1.tar.xz">http://freedesktop.org/software/pulseaudio/releases/pulseaudio-1.99.1.tar.xz</a> When i have compiled and install above pulseaudio version, I am no able to run gstreamer pipeline (even alsa pipelines also not working) vutp@vutp-TW8-SW8-DW8:~$ gst-launch-0.10 pulsesrc ! pulsesink Setting pipeline to PAUSED ... ERROR: Pipeline doesn't want to pause. ERROR: from element /GstPipeline:pipeline0/GstPulseSrc:pulsesrc0: Failed to connect stream: Invalid argument Additional debug info: pulsesrc.c(1067): gst_pulsesrc_prepare (): /GstPipeline:pipeline0/GstPulseSrc:pulsesrc0 Setting pipeline to NULL ... Freeing pipeline ... Without above pulseaudio/ older version, its working fine. #./configure --prefix=/usr settings Enable X11: no Enable OSS Output: yes Enable OSS Wrapper: yes Enable EsounD: yes Enable Alsa: yes Enable CoreAudio: no Enable Solaris: no Enable WaveOut: no Enable GLib 2.0: yes Enable Gtk+ 2.0: yes Enable GConf: no Enable Avahi: yes Enable Jack: no Enable Async DNS: no Enable LIRC: no Enable Xen PV driver: no Enable D-Bus: yes Enable HAL: yes Enable BlueZ: no Enable udev: yes Enable HAL->udev compat: no Enable TCP Wrappers: no Enable libsamplerate: no Enable IPv6: yes Enable OpenSSL (for Airtunes): yes Enable fftw: no Enable orc: no Enable Adrian echo canceller: yes Enable speex (resampler, AEC): yes Enable WebRTC echo canceller: yes Database tdb: no gdbm: no simple database: yes System User: pulse System Group: pulse Access Group: pulse-access Enable per-user EsounD socket: yes Force preopen: no Preopened modules: all Legacy Runtime Dir Support: yes Legacy Database Entry Support: yes # Below is the my OS details: Linux vutp-TW8-SW8-DW8 3.0.0-16-generic #29-Ubuntu SMP Tue Feb 14 12:48:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux # attached is the pa.log Regards, Ashwani