Re: [LAU] MusE RtcTimer cannot set freq

On Thu, November 1, 2012 4:28 am, Ralf Mardorf wrote:
> Changing file permissions didn't solve it.

Shouldn't have to, should be in group audio by default.

>
> Trying RTC timer...
> RtcTimer::setTimerFreq(): cannot set freq 1024 on /dev/rtc: Permission
> denied precise timer not available, check file permissions and allowed
> RTC freq (/sys/class/rtc/rtc0/max_user_freq) Trying ALSA timer...
> AlsaTimer::initTimer(): best available ALSA timer: system timer
> got timer = 72
>
> Muse 2.0.1 Ubuntu Quantal amd64
>
> Any hints are welcome!

edit /etc/rc.local and add a line before the exit like:
echo 3072 >/sys/class/rtc/rtc0/max_user_freq

Also, may not be needed here but recommended for other apps, edit the last
line of /etc/sysctl.d/50-ubuntustudio.conf to uncomment:
dev.hpet.max-user-freq=3072

We have been testing this and had been unable to see any difference with
it enabled or not in MIDI jitter etc. I am not sure if there are downsides
to setting these (more cpu usage for example), but personally I would give
up cpu usage for better sound.

Please let me know if this helps and I will make it the default.

-- 
Len Ovens
www.OvenWerks.net
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