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Old 08-13-2010, 10:18 PM
Nikos Chantziaras
 
Default JACK breaks at random

On a system where I can't use OSSv4 for sound (due to MIDI) and need to
fall back to ALSA, I've hit ALSA's insane latency issues and therefore
decided to use JACK. I'm trying to set-up a machine suitable for
music/audio production.


But JACK just stops working at random. Sometimes it works, but after a
a while it doesn't anymore. And when that happens (which happens sooner
rather than later,) restarting JACK (with qjackctl) doesn't help; only
rebooting the machine does, which as you can guess is very annoying.


I'm appending the error message in case someone can help me figure out
what's going on.


I'm on AMD64, kernel 2.6.35.1 (gentoo-sources-2.6.35-r1) using in-kernel
ALSA on a SoundBlaster Live 24-bit.



----------
Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle
Sat Aug 14 01:15:42 2010: ERROR:
JackProcessSync::LockedTimedWait error usec = 5000000 err = Connection
timed out

Sat Aug 14 01:15:42 2010: ERROR: Driver is not running
Sat Aug 14 01:15:42 2010: ERROR: Cannot open client name =
dbusapi
Sat Aug 14 01:15:42 2010: ERROR: failed to create dbusapi
jack client

Sat Aug 14 01:15:42 2010: ERROR: alsa_driver_xrun_recovery
Sat Aug 14 01:15:42 2010: ERROR: JackAudioDriver::ProcessAsync:
read error, skip cycle

Sat Aug 14 01:15:42 2010: Released audio card Audio0
Sat Aug 14 01:15:42 2010: ERROR: Failed to start server
01:15:45.793 Could not connect to JACK server as client. - Overall
operation failed. - Unable to connect to server. Please check the
messages window for more info.
 
Old 08-14-2010, 07:23 AM
pk
 
Default JACK breaks at random

On 2010-08-14 00:18, Nikos Chantziaras wrote:

> But JACK just stops working at random. Sometimes it works, but after a
> a while it doesn't anymore. And when that happens (which happens sooner
> rather than later,) restarting JACK (with qjackctl) doesn't help; only
> rebooting the machine does, which as you can guess is very annoying.

I don't use jack (but I use alsa without problems) but this might help:
http://art.ubuntuforums.org/showthread.php?p=9717379
...maybe? Googling, also seems to indicate the need for a "realtime"
configured kernel (don't know if you got that or not)...

Best regards

Peter K
 

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