Thanks for the info, by testing, error and trial, it seems to be fixed so far by using jackd -c s. I've figured out my chipset has no hpet. I've edited a config file to give ohci1394 higher priorities since my soundcard is firewire based. But it only had the opposite effect, strangely enough, so I changed it back to it's default state. I've managed to set the frequency scaling to 'performance' by default. My machine is no laptop, so I think that shouldn't be an issue for the temperature, apart from power consumption :-). I also noticed rakarrack caused errors x-runs, just by handling it's interface, moving a slider, clicking on a button. I don't know why, it was no problem in the past. Anyways, starting jackd with -c s was a major improvement so far. Grtz, Bart <a href="http://www.bartart3d.be/">http://www.bartart3d.be/</a> <div class="gmail_quote">2011/12/7 Gustin Johnson <<a href="mailto:gustin@meganerd.ca">gustin@meganerd.ca</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> hpet is a hardware timer included on most machines since 2005 (<a href="http://en.wikipedia.org/wiki/High_Precision_Event_Timer" target="_blank">http://en.wikipedia.org/wiki/High_Precision_Event_Timer</a>) This is generally what I use. You may also want to disable frequency scaling as I have noticed that xruns seem to occur when the CPU changes frequencies. There should be an applet for that (there was under Gnome). I use KDE which does not seem to have such an applet, so I wrote a quick little script to handle that. I also assume that you meant that you have already installed and tweaked rtirq? Hth, <div class="HOEnZb"><div class="h5"> On Mon, Dec 5, 2011 at 3:02 PM, bart deruyter <<a href="mailto:bart.deruyter@gmail.com">bart.deruyter@gmail.com</a>> wrote: > Hi all, > > I've managed to set up my system oneiric, 64 bit to run fairly well, though > I have noticed I still have a problem with a certain setup. > > When using two instances of rakarrack, and hydrogen, I let hydrogen run > through one instance of rakarrack, then one input of my sound card for my > guitar through the other instance of rakarrack. > > This works fairly well, but then I set hydrogen as sync master, and enable > the tempo sync from rakarrack to jack and I start to get x-runs. > > Is there something I can do to improve my system apart from those on the > linuxmusicians wiki? > > I already modified the settings for IRQ handling, and set ohci1394 (sound > card is firewire based) as second in the list too. > > I've read something about the clocksource in the man page of jackd, but I > don't understand what it means. clocksource cycle, hpet and system are the > options. What does this mean, and what would be recommended. Could this flag > in jackd improve performance? > > I already use xfce too by the way. > > grtz, > Bart > <a href="http://www.bartart3d.be/" target="_blank">http://www.bartart3d.be/</a> > </div></div>> -- > Ubuntu-Studio-users mailing list > <a href="mailto:Ubuntu-Studio-users@lists.ubuntu.com">Ubuntu-Studio-users@lists.ubuntu.com</a> > Modify settings or unsubscribe at: > <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users</a> > -- Ubuntu-Studio-users mailing list <a href="mailto:Ubuntu-Studio-users@lists.ubuntu.com">Ubuntu-Studio-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users</a> </blockquote></div> <style>img, #cubbies-overlay{ -moz-transition-property: margin, box-shadow, z-index; -moz-transition-duration: 0.1s; -webkit-transition-property: margin, box-shadow, z-index; -webkit-transition-duration: 0.1s; } .cubbies-selected{ z-index: 9999; box-shadow: 3px 3px 8px -1px blue !important; cursor: pointer !important; margin: -3px 3px 3px -3px; } .cubbies-selected:active{ box-shadow: 2px 2px 5px -1px darkblue !important; margin: -1px 1px 1px -1px; } #cubbies-overlay{ position: fixed; z-index: 9999; bottom: 30px; left: 30px; box-shadow: 0 2px 3px rgba(0,0,0,0.8); border: none; } #cubbies-overlay:hover{ box-shadow: 0 2px 3px rgb(0,0,0); }</style>