Hi, I tried to follow your instructions, so I built pjproject-1.10 (with and without #define PJMEDIA_AUDIO_DEV_HAS_ALSA 1). My first test was to run pjsystest under the old-kernel machine (Linux 2.6.16.16) and under Linux 2.6.39. I found that in both Linux the microphone wasn?t working in the recording test... so I found the problem was pjsua (both versions) was detecting 3 sound devices and assigning the wrong one to the microphone. The correct one was "default" as it opened: Port #00[ 8KHz/20ms/1] CS5535 Audio: CS5535 Audio (hw:0,0) transmitting to: #3. and wasn?t working. Now, I launch pjsua (1.0.1 and 1.10.0) with this command: /mntDAT/VoIP/pjsua --ec-tail=256 --ec-opt=0 --add-codec pcma --clock-rate 8000 --no-vad --quality 10 \ --app-log-level=0 --capture-dev=1 --playback-dev=1 --auto-answer=200 Afterwards, I made some tests under Linux 2.6.16.16 and 2.6.39. The "client" is pjsua 1.0.1 running under Linux 2.6.16.16: /mntDAT/VoIP/pjsua --ec-tail=256 --ec-opt=0 --add-codec pcma --clock-rate 8000 --no-vad --quality 10 \ --log-file=client.log --log-level=6 --app-log-level=0 --duration=300 sip:172.22.195.24 The "server" tested both pjsuas under both kernels: /mntDAT/VoIP/pjsua --ec-tail=256 --ec-opt=0 --add-codec pcma --clock-rate 8000 --no-vad --quality 10 \ --log-file=server.log --log-level=6 --app-log-level=0 --capture-dev=1 --playback-dev=1 --auto-answer=200 The main results are: - Linux 2.6.16.16 -> pjsua working OK in both versions. - Linux 2.6.39 -> pjsua 1.0.1 more or less OK (sometimes the sound drops...) pjsua 1.10.0 not working. Also, gets blocked and cannot press 'q' in order to exit. I attach some logs. I hope you could help me by having a look at them: Test1: Client Linux 2.6.16.16, pjsua 1.0.1 - Server Linux 2.6.39, pjsua 1.0.1 Test2: Client Linux 2.6.16.16, pjsua 1.0.1 - Server Linux 2.6.39, pjsua 1.10.0 Test3: (the same as Test 2) Client Linux 2.6.16.16, pjsua 1.0.1 - Server Linux 2.6.39, pjsua 1.10.0 Thanks in advance. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111013/7425b17d/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: client_1.log Type: text/x-log Size: 146116 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111013/7425b17d/attachment-0006.log> -------------- next part -------------- A non-text attachment was scrubbed... Name: client_2.log Type: text/x-log Size: 21081 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111013/7425b17d/attachment-0007.log> -------------- next part -------------- A non-text attachment was scrubbed... Name: client_3.log Type: text/x-log Size: 19834 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111013/7425b17d/attachment-0008.log> -------------- next part -------------- A non-text attachment was scrubbed... Name: server_1.log Type: text/x-log Size: 57110 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111013/7425b17d/attachment-0009.log> -------------- next part -------------- A non-text attachment was scrubbed... Name: server_2.log Type: text/x-log Size: 16384 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111013/7425b17d/attachment-0010.log> -------------- next part -------------- A non-text attachment was scrubbed... Name: server_3.log Type: text/x-log Size: 17408 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20111013/7425b17d/attachment-0011.log>