GST_DEBUG=3 GST_DEBUG_NO_COLOR=1 gst-launch-0.10 audiotestsrc ! audioconvert ! alsasink &>gst-launch.log there was a space missing before gst-launch-0.10 -- gstreamer10 is unable to output sound using alsa on an ibm thinkpad t43 https://launchpad.net/bugs/42881