[linux-audio-user] Problems with RP patch + hdsp + jackd at 96000

From: Mario Lang <mlang@email-addr-hidden>
Date: Thu Jun 23 2005 - 08:46:02 EEST


I recently patched my kernel with the RP patch by Ingo to get rid
of the many xruns I was getting with my brand new Multiface (PCI).

THe result is somewhat strange, so I thought I'd post a summary here and see
if someone else has had similar problems:

1. jackd -d alsa -dhw:1 -p64
   At 48kHz, jackd ran the whole night with SuperCollider connected
   to some of its ports without a single xrun! This is a massive improvement.
2. jackd -d alsa -dhw:1 -p64 -r96000
   This used to work without the RP patch applied, it generated some
   xruns, but it used to work. Now, using the RP patch, jackd seem
   to simply hang. If I boot up the SuperCollider synthesis server,
   it results in a "failed to start" message by SC. Normal jack clients
   like jack_lsp do still work, but jackd exits after about 10 seconds or
   so, claiming its watchdog killed it. Without -R, it runs without
   dying, but no audio clients work.

   One indication that the problem is really originating from within
   jackd is the fact that -v does not produce any of the load-statistic
   output if used as argument to jackd.

Linux lexx 2.6.12-rt-v0.7.50-10 #1 Wed Jun 22 14:59:13 CEST 2005 i686 GNU/Linux

jackd version 0.99.0 tmpdir /dev/shm protocol 13

Received on Thu Jun 23 12:15:04 2005

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