Hi Will, [..] > Eventually I found the cause. Going from linux kernel 3.2 to 3.16 :( > This, apparently, does very aggressive CPU frequency scaling. Drop back to 3.2 > and all is sweetness and light again. > > The question is whether there is a reasonably straightforward way to stop this > behaviour. Doing the usual searches doesn't seem to turn up anything useful. > > Any help gratefully appreciated. > > I would add that I've double checked that the bios is set for 'performance'. Just a shot in the dark here, but did you try using the "cpufreq-set" tool (in Debian-based distributions: in package "cpufrequtils) to set the CPU governor? (As root), do: # cpufreq-set -g performance On an older machine, I had Xrun issues sometimes, and this tool helped overcome it at that time. However, I have never seen the CPU load spikes you mention. Greetings, Frank _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user