Jack O'Quin wrote: [cut] > What happens if you omit --enable-posix-shm? System V shm seems to > work better on Linux. POSIX shm is mainly used for OSX. Tried that. I'm still testing it... 64 frames/buffer leads to crackling after a minute or so. Ok, I somehow expected that as it's consumer hardware. Pushed jackd to 128 frams/buffer, fired up xmms with xmms-jack, and in a terminal, half a dozen " ls -R / & ". It seems more robust to my "pound" script, as it takes more pounds to wreck the sound, (but also more pounds to restore it) But sometimes when I fire up ZynAddSubFX, the sound wrecks again... Tried that up to 2048 frames/buffer :( Moreover, using jack_bufsize, or resizing buffer within Ardour, causes complete muting of output sound (bit not clients death, as it was before), until I restart jack. Notice that this "complete muting" only affects the output ports, i.e. I can continue recording with qarecord, or ardour, I just cannot hear (and monitor) anything anymore until I restart jack and its clients. Also the crackling problem only affects the output ports, as I pointed out in the first post (and on jackit-devel) What other tests can I do? Thank you ciao -- salvuz POST FATA RESVRGO Linux registered user #291700 | machine #174619 get counted on ---> http://counter.li.org/ <---