Last Tuesday 22 June 2004 04:07, David Corkill was like: > Starting Jack with ?Qjackctl gives an error message: ... > > JACK: unable to mlock() port buffers: Operation not permitted > cannot set thread to real-time priority (FIFO/20) (1: Operation not > permitted) > cannot use real-time scheduling (FIFO/10) (1: Operation not permitted) > 12:24:50.512 Could not connect to JACK server as client. Are you running a kernel with realtime capabilities? The stock Mandrake kernel probably does not have this. I'm not an expert on this matter. You need a kernel patched for low-latency, realtime operation and which hopefully allows you to do this as an ordinary user. > Starting Jack from the command line < jackd -d alsa -d hw:0 > results in: > > loading driver .. > creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|rt|32bit > control device hw:0 > configuring for 48000Hz, period = 1024 frames, buffer = 2 periods > Couldn't open hw:0 for 32bit samples trying 24bit instead > Couldn't open hw:0 for 24bit samples trying 16bit instead > Couldn't open hw:0 for 32bit samples trying 24bit instead > Couldn't open hw:0 for 24bit samples trying 16bit instead Try messing with the Setup options too. 'Force 16bit' will stop it trying to do this. JACK _will_ balk at some options. I run with Realtime and Soft Mode enabled and a 5s timeout, which seems to work for most things. cheers tim hall
