Public bug reported:

Trying to run the Supercollider http://supercollider.github.io/ sound
synthesis program on an ARM-based NVIDIA Jetson TK1, I received this
error.  I also received this when I tried jack_simple_client

FATAL: cannot locate cpu MHz in /proc/cpuinfo

This is from the Jack Library.  
$ apt-cache policy libjack-jackd2-0:armhf
libjack-jackd2-0:
  Installed: 1.9.9.5+20130622git7de15e7a-1ubuntu1
  Candidate: 1.9.9.5+20130622git7de15e7a-1ubuntu1
  Version table:
 *** 1.9.9.5+20130622git7de15e7a-1ubuntu1 0
        500 http://ports.ubuntu.com/ubuntu-ports/ trusty/main armhf Packages
        100 /var/lib/dpkg/status
(updated in 2013)

The issue is fixed in the latest source by this checkin: (from March, 2014)
https://github.com/jackaudio/jack2/commit/d425d8035b761b4a362c538c41eca874ff4995f0

I have found this latest source works for me if I compile and install
jack by hand.  So, I think updating the libjack-jackd2-0:armhf library
would be desirable.  Until then, all ARM-based systems can't use jack.

Also see https://bugs.launchpad.net/ubuntu/+source/audacity/+bug/1347914
for a similar report for the program Audacity.

Additional details

$ lsb_release -rd
Description:    Ubuntu 14.04.1 LTS
Release:        14.04

$ uname -a
Linux muggy 3.10.24-gf455cd4-dirty #3 SMP PREEMPT Tue Jul 22 12:20:38 PDT 2014 
armv7l armv7l armv7l GNU/Linux

** Affects: jackd2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1353832

Title:
  arm CPUs get "FATAL: cannot locate cpu MHz in /proc/cpuinfo"

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