Audacity crashes on startup while trying to read /proc/cpuinfo

[Peter Bauer]

root@tegra-ubuntu:~# audacity
ALSA lib pcm_dsnoop.c:618:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
bt_audio_service_open: connect() failed: Connection refused (111)
bt_audio_service_open: connect() failed: Connection refused (111)
bt_audio_service_open: connect() failed: Connection refused (111)
bt_audio_service_open: connect() failed: Connection refused (111)
ALSA lib pcm_dmix.c:961:(snd_pcm_dmix_open) The dmix plugin supports only playback stream
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
FATAL: cannot locate cpu MHz in /proc/cpuinfo

It looks like audacity requires the Bogomips value from /proc/cpuinfo which is no more
present in modern kernels.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: audacity 2.0.5-1ubuntu3.2
Uname: Linux 3.10.24-gf455cd4 armv7l
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: armhf
CurrentDesktop: Unity
Date: Wed Jul 23 22:44:22 2014
SourcePackage: audacity
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel Letzeisen (dtl131)]

Looks specific to ARM (Trusty still gives bogomips for my CPU).
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-June/178645.html

[Peter Bauer (peba)]

Please read here:
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-June/178645.html

Could someone talk with Will Deacon from arm.com about removing Bogomips ?
Whats your opinion ?

[Roger Allen (rogerallen)]

I believe this error

FATAL: cannot locate cpu MHz in /proc/cpuinfo

is related to the Jack Library and I believe it is fixed in the latest source by this checkin:
https://github.com/jackaudio/jack2/commit/d425d8035b761b4a362c538c41eca874ff4995f0

So, I think updating the jackd library would fix the problem for Audacity. I haven't tested Audacity myself, but I did test another audio library Supercollider which had the same error until I installed my own compiled version of jack.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel Letzeisen (dtl131)]

jackd2 (1.9.9.5+20140404git3d7c67dc~dfsg-1) unstable; urgency=low

  * Enable ffado on all Linux platforms (Closes: #727248)
  * Imported Upstream version 1.9.9.5+20140404git3d7c67dc
  * Fix startup problems on newer ARM kernels

 -- Adrian Knoth <email address hidden> Fri, 04 Apr 2014 14:04:15 +0200