Don't mind the audio errors in my sisytem. Some time ago I wanted to try Jack and since then the playback with CinnGG works only with Jack active (or without Jack setting Sink #0). But it's not Cin's problem, it's mine. Now with the latest version I have compiled from root in /tmp and run Valgrind to get the core dump. I noticed these behaviors (no valgrind): 1- Set Playback audio to "default": No audio, no crash. 2- Set Playback to default with Jack: No audio, no crash. 3- Set Playback to Sink #0: crash (with or without Jack). [cinelerra_19968.dmp] I then compiled normally in /home/user... It no longer behaves like the last installations, because now the audio works by default and does not work with Sink #0. I don't know if the two installations influence each other (the one in /tmp and the one in /home/....). I think so because after starting the "normal" one now the audio works also in /tmp 1-2- Yes audio, no crash. But I repeat: do not waste time with errors that do not concern CinGG. https://www.dropbox.com/s/s9pzohcv2qfekg9/cinelerra_19968.dmp?dl=0 https://www.dropbox.com/s/qwz9uy4wk0p5qrm/tmp-boot-log.txt?dl=0