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[Pander <649542@xxxxxxxxxxxxxxxxxx>]

>From FFADO maintainer:

   Bug: More xruns under new Firewire kernel stack compared to the old
stack.

   Suggestion:
       The final comment in this bug report suggests that an upgrade to
       Ubuntu 11.04 resolved the problem.  The bug should therefore be
       closed.

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https://bugs.launchpad.net/bugs/649542

Title:
  New firewire stack makes more FFADO XRUNs than old firewire stack.

Status in libffado package in Ubuntu:
  New

Bug description:
  I have a firewire audio device, M-Audio Firewire Solo. It works fine
  in Lucid but not so good in Marveric because of much FFADO XRUNs in
  jackd2.

  My IEEE 1394 chipset is below,
  FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 04)

  $ dpkg -l | grep ffado
  ii  ffado-dbus-server   2.0.1+svn1856-1ubuntu1          FFADO D-Bus server
  ii  ffado-mixer-qt4        2.0.1+svn1856-1ubuntu1         FFADO D-Bus mixer applets (QT4)
  ii  ffado-tools               2.0.1+svn1856-1ubuntu1          FFADO debugging and firmware tools
  ii  libffado2                  2.0.1+svn1856-1ubuntu1          FFADO API

  At first, the kernel modules for this device is "New Firewire Stack"
  (so-called by FFADO developer), firewire_ohci, firewire_core and
  crc_itu_t. Then I get much FFADO XRuns,

  Secondly I use "Old Firewire Stack", ohci1394, raw1394, ieee1394 with
  the commands of rmmod and modprobe, these modules are standard in
  Lucid. Then I got a few FFADO XRUNs.

  In both ways, I play the same music in the same sequencer.

  In detail, please refer to the logs of "ffado-diag" and "jackd -v"
  I'LL attach. The "_old" means the old firewire stack and the "_new"
  means new one.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: libffado2 2.0.1+svn1856-1ubuntu1
  ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
  Uname: Linux 2.6.35-22-generic i686
  Architecture: i386
  Date: Tue Sep 28 13:22:50 2010
  InstallationMedia: Ubuntu-Studio 10.10 "Maverick Meerkat" - Beta i386 (20100902.1)
  ProcEnviron:
   LANG=ja_JP.utf8
   SHELL=/bin/bash
  SourcePackage: libffado

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