Hello. I'm not entirely new to Pure:Dyne, and I've been hacking around with linux for over 2 years now so I'm generally able to solve problems on my own, with help of internet discussion of course, but I can't seem to get this one.
I have the same problem on another machine I've tried installing a realtime kernel on as well. I followed the instructions for a full install of pure:dyne; fresh debian install, updated repositories, updated apt, downloaded the realtime kernel (2.6.29.3-rt14-pure-686 #1 SMP PREEMPT RT), booted into it and uninstalled the standard kernel, and proceeded to install all of the pure:dyne standard packages. Once that was done I thought I'd try to start up jack in realtime and play around a bit to make sure things worked. However when I try to start jack I get this error message (the same as on the other machine with a realtime kernel, these are kernels I did NOT compile myself, but downloaded from repositories): JACK compiled with System V SHM support. cannot use real-time scheduling (FIFO at priority 10) [for thread -1212373328, from thread -1212373328] (1: Operation not permitted) cannot create engine If I run the same command as root, jack starts fine. So the realtime capabilities seem to be there. I know the first answer will be "Edit your /etc/security/limits.conf and add the @audio rtprio and so on..." I've done this, and it doesn't help. I think it has something to do with memory, and not the audio preemption. The only relevant thing I could find had something to do with the realtime_lsm module, which I tried building for this kernel, but it didn't work. So I'm really unsure of what to do here. When I run modprobe, I don't get any results for a realtime module of any kind. But why wouldn't the pure:dyne kernel be compiled correctly to support realtime? I just don't get it. Perhaps its a simple permissions problem (something to do with /dev/shm?) but I can't figure it out. If anyone has any insights or advice, please let me know. I'd love to have realtime capabilities without using a liveCD. Thanks, Grant
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