I had a hard time finding out why Rosegarden sometimes shifts to a
higher speed and - after some seconds - shifts back again. Audio tracks
were out of sync then.
Obviously my Linux 3.0 kernel has no problem with Speedstep (varying CPU
clock) but with Turboboost. After I switched off Turboboost in the BIOS
the speed shifts nerver happened again.
Core i5-2300, Xubuntu 11.10, Rosegarden 11.06
/usr/bin/jackd -R -dalsa -D -Phw:0,0 -Chw:0,0 -Xseq -p256 -r44100