Ralf, thanks for the explanation. It does work better with the performance setting. I do still get xruns when using midi though. Using sooperlooper, I trigger recording with the pedal of my keyboard, through an usb2midi misport2x2.
I guess the search for the PREEMPT_RT kernel is in place.. is there a PPA I could use, or do I have to build it myself? Or is it the linux-headers-2.6.31-12-realtime? I have it listed in the falk-tx ppa. grtz, Bart http://www.bartart3d.be/ 2011/6/5 Ralf Mardorf <ralf.mard...@alice-dsl.net> > On Sun, 2011-06-05 at 11:44 +0200, bart deruyter wrote: > > Ok, I did some tests, xruns keep happening on 512 Frames/Period and > > 1024 Frames/Period at 48000, setting Periods/Buffer at 2. At 3 > > Periods/Buffer there is too much latency in my opinion. > > > > Next step, how do I change the governer from 'ondemand' to > > 'performance'? I've never done that before, didn't even need to do > > that in the previous ubuntustudio versions. > > You can run > > sudo -i > cpufreq-selector -g performance > > The better choice is to > > right click to the GNOME panel > Add to panel... > CPU frequency scaling > monitor > > Once it is in the panel, left click to the scaling monitor icon and > chose 'performance'. > > > > > > About the kernel : > > Weird, I keep reading from ubuntustudio that the generic kernel in > > Ubuntustuido 11.04 should be good enough, on the wiki with the > > comparing table I read better results from the lowlatency kernel.. and > > now there is the need for the preempt rt.... It is getting very, very, > > very confusing for me. > > > > but thanks for the help of course.. step by step, we'll get there.. we > > just have to. > > For kernels before version 2.6.39 and this version isn't supported by > any repository jet, real-time optimisation only is done with kernel-rt. > A kernel without RT can work too, but when you get issues, then use a > kernel-rt. > > Hth, > > Ralf > > > -- > Ubuntu-Studio-users mailing list > Ubuntu-Studio-users@lists.ubuntu.com > Modify settings or unsubscribe at: > https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users >
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