Ubuntu Dapper Flight 3 realtime Part 2 February 20, 2006Posted by oktyabr in audio, debian, linux, realtime, ubuntu.
Welp, realtime-lsm-module proved not to actually exist so I ended up building it manually with module-assistant (gotta love debian!)
I also did the following with no errors:
sudo /sbin/modprobe realtime gid=29
sudo /etc/init.d/realtime start
Now firing up qjackctl as root and enabling realtime let’s me get as low as I want (2.9ms) with no xruns whatsoever, even under a load, but as user with realtime enabled I can’t get below 20ms without xruns… at least in KDE! Even with a respectable amount of latency I still get at least one xrun and a distinctive POP! out of my speakers whenever I make a connection in qjackctl… Something is still missing… perhaps the preemptive patch in the ubuntu kernel? Sooo… how about something other than KDE?
sudo apt-get install fluxbox (installed suggested too)
Restart X, login to a fluxbox session and what do you know! I’ve been running qjackctl as user at 5.8ms with ZERO xruns… at 20%cpu load! Loving it!
Already this afternoon I’ve got a fresh Kubuntu Dapper Flight 3 installed with the latest 2.6.15-14 kernel, added the realtime-lsm module, the latest nvidia drivers, firefox 1.5 and gotten super low latency as user. Not bad for half a day’s work 😉
Am reading up on building DSSI packages for debian which is my next project, since he doesn’t support sid with his binaries and ubuntu struggles with non-ubuntu debs anyway…