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[Erich Eickmeyer <1884101@xxxxxxxxxxxxxxxxxx>]

** Changed in: jackd2 (Ubuntu Focal)
     Assignee: Erich Eickmeyer (eeickmeyer) => (unassigned)

** Summary changed:

- jackdbus produces high cpu load
+ [SRU] jackdbus produces high cpu load

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https://bugs.launchpad.net/bugs/1884101

Title:
  [SRU] jackdbus produces high cpu load

Status in jackd2 package in Ubuntu:
  Fix Released
Status in jackd2 source package in Focal:
  In Progress
Status in jackd2 source package in Groovy:
  Fix Released

Bug description:
  [Impact]

   * Users have reported issues with high CPU load when running jackd and 
     jackdbus, causing system slowdowns

   * This newer version was backported into the Ubuntu Studio Backports PPA 
     and has shown to have success in fixing this issue.

  [Test Case]

   * Attempt to run jackd and jackdbus, jackd tends to take 100% per CPU

   * Killing jackd and jackdbus reduces CPU down to nominal levels

   * Version in Ubuntu Studio Backports PPA does not have this issue,
  same version exists in Ubuntu Groovy Gorilla.

  [Regression Potential]

   * Since jackd is used by multiple professional audio applications and
  therefore there could be potential negative impact on those
  applicaitons.

   * Although that regression potential exists, multiple users have
  reported great success when using the newer version.

  [Other Info]
   
   * Although not a "bug" per se, upstream developer lamented the fact that the version in 20.04 is so far behind. 

   * Most audio applications and plugins in Ubuntu 20.04 have been
  developed with this version of Jackd in mind.

  ----
  Original bug report:

  
  if jackd and jackdbus run, jackd and/or jackdbus produce high cpu load. jackd tends to take all availabl CPU power bringing the system to slow down remarkably. Killing jackd and jackdbus frees cpu and system load drops from 100%/per CPU down to ~4% overall.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: pulseaudio-module-jack 1:13.99.1-1ubuntu3.3
  ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
  Uname: Linux 5.4.0-37-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sct-muc    1800 F.... pulseaudio
   /dev/snd/pcmC0D0c:   sct-muc    1800 F...m pulseaudio
   /dev/snd/pcmC0D0p:   sct-muc    1800 F...m pulseaudio
   /dev/snd/timer:      sct-muc    1800 f.... pulseaudio
  CasperMD5CheckResult: skip
  Date: Thu Jun 18 18:08:25 2020
  InstallationDate: Installed on 2019-09-09 (282 days ago)
  InstallationMedia: Xubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  ProcEnviron:
   LANGUAGE=de_DE
   TERM=screen
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  SourcePackage: pulseaudio
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/27/2020
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.name: 440BX Desktop Reference Platform
  dmi.board.vendor: Intel Corporation
  dmi.board.version: None
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd02/27/2020:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: VMware Virtual Platform
  dmi.product.version: None
  dmi.sys.vendor: VMware, Inc.

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