Thomas, I do not get anything like: "Clocksource tsc unstable (delta = -107437170 ns)" in dmesg... when booting with "acpi=off", cat /sys/devises/..../current_clocksource returns: "tsc" when booting in regular mode (acpi enabled), cat /sys/devises/..../current_clocksource returns: "acpi_pm" thanks and best regards Susanne Thomas Kuther schrieb: > On Mo, 19.11.07 10:46 susemuse27@xxxxxx wrote: > > >> hi, >> I should have known this earlier: when starting my 2.6.24.rc2-rt1 >> with option "acpi=off" the audio performance increases significantly >> and I could be happy - but - the levelmeters in Ardour's Mixer are >> now acting strangely: They rise quickly but the falloff rate is at >> lowest level and can't be adjusted. I've tried with a different >> kernel, 2.6.23.1-rt11 - it's the same. Of course I can live with >> that, it doesn't prevent me from enjoying my musical activity, but it >> takes some patience... With acpi on action Ardour works fine. Did >> anybody make similar experience and can give me a hint where to start >> my investigations? thanks Susanne >> >> data: >> Asus Laptop AMD Athlon 64 >> ATI-MobilityRadeon9700 >> openSuse 10.2-32Bit >> USB-Lexicon Omega Studio >> Ardour built with VST-support >> >> > > Hi Susanne, > > this sounds like a problem with the clocksource. > That could be caused by powernow-k8 and cpufrequency scaling. > > I assume when the cpu is powered down right after startup, you see some > messages in dmesg saying: > ------ > Clocksource tsc unstable (delta = -107437170 ns) > ------ > > If so, you could try to disable cpu frequency scaling > or make sure the system starts and runs with performance governor. > > cat /sys/devices/system/clocksource/clocksource0/current_clocksource > shows the currently used clocksource. Please post the output of that > when booting with acpi=off and acpi enabled. > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user > _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
