Don't run programs as root, your system will be as insecure as a windows box... Just allow rt privileges to the audio group, and add yourself to this group. Then start jack with rt privileges. All software linked to Jack will run with -rt.
JACK requires real-time scheduling privileges for reliable, dropout-free operation. The server requests these privileges when running with the -R option.
Most recent distributions use PAM to manage the permissions of users on a relatively granular level. If the file /etc/security/limits.conf exists on your system, it is using PAM. In order to configure PAM such that normal users can run jackd with realtime privileges make sure the following lines exist: @audio - rtprio 99 @audio - memlock unlimited
2010/10/12 Pedro Lopes pedro.lopes@ist.utl.pt:
If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl). I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia rafael.raccuia@blindekinder.com wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list