Summarized: I guess my mobo supports hpet :).
$ dmesg | grep -i hpet [ 0.000000] ACPI: HPET 77EE89C0, 0038 (r1 ATI ASUSACPI 42302E31 AWRD 98) [ 0.000000] ACPI: HPET id: 0x8200 base: 0xfed00000 [ 0.000999] hpet clockevent registered [ 0.000999] HPET: 4 timers in total, 0 timers will be used for per-cpu timer [ 0.177117] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0 [ 0.177123] hpet0: 4 comparators, 32-bit 14.318180 MHz counter [ 1.166497] rtc0: alarms up to one month, 242 bytes nvram, hpet irqs 1. The kernel has to support it too. 2. If the kernel-rt does support it, I need to add a startup script: chgrp audio /dev/hpet echo 1024 > /proc/sys/dev/hpet/max-user-freq modprobe snd-hrtimer Here I don't understand what the value 1024, written to max-user-freq does mean ;). 3. I need to launch JACK2 with the option "-c", e.g.: jackd -Rc h -dalsa -dhw:0 -r96000 -p512 -n2 -Xseq 4. The sequencer timing source needs to be set up to hpet or hrtimer too? rosegarden -v 1.7.3 and qtractor -v 0.4.3.1418 aren't able to do it? Or will the "-c" option for JACK2 replace a chosen timer for Qtractor or Rosegarden with hpet? --- "With a Linux kernel, you need the newer "rtc-cmos" hardware clock device driver rather than the original "rtc" driver." (http://en.wikipedia.org/wiki/High_Precision_Event_Timer) I guess this is within the vanilla kernel source code?! Cheers, Ralf _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev