[linux-audio-user] Cannot get qjackctl, jackd, alsa working.

[David Froseth]

Rui,
	I clicked 'Applications > Sound & Video > JACK Control' from the 
Ubuntu/Gnome GUI as normal user.  I do not know what the realtime-lsm 
module is or pam security rlimits are.  Could you elabourate or direct 
me to some reading material?

Thanks,
Dave

Rui Nuno Capela wrote:

>>Patrick Shirkey wrote:
>>
>>>David Froseth wrote:
>>>
>>>
>>>>I am trying to get jackd, qjackctl, and alsa working on a pentium d
>>>>desktop running ubuntu edgy.  I am getting these error messages when
>>>>I start qjackctl:
>>>>
>>>>..........
>>>>
>>>>ALSA: final selected sample format for capture: 32bit little-endian
>>>>ALSA: use 2 periods for capture
>>>>ALSA: final selected sample format for playback: 32bit little-endian
>>>>ALSA: use 2 periods for playback
>>>>12:38:49.469 Could not connect to JACK server as client. Please check
>>>>the messages window for more info.
>>>>**** alsa_pcm: xrun of at least 0.024 msecs
>>>>**** alsa_pcm: xrun of at least 0.012 msecs
>>>>12:38:57.669 MIDI connection change.
>>>>**** alsa_pcm: xrun of at least 0.534 msecs
>>>>12:38:58.077 Could not connect to JACK server as client. Please check
>>>>the messages window for more info.
>>>>**** alsa_pcm: xrun of at least 0.124 msecs
>>>>**** alsa_pcm: xrun of at least 2.709 msecs
>>>>12:39:01.196 JACK is stopping...
>>>>**** alsa_pcm: xrun of at least 2.769 msecs
>>>>jack main caught signal 15
>>>>no message buffer overruns
>>>>12:39:01.333 JACK was stopped successfully.
>>>>
>>>>Any ideas on how to fix this?
>>>>
>>>
>>>There are a few possibilities.
>>>
>>>- How are you starting the jack server and which user - root or normal?
>>>
>>>- Is this the output from the qjackctrl error window or the command line?
>>>
>>>
> 
> 
> You didn't answer to the first question, which I think is the major. You
> have three possibilities:
> 
> 1) run everything as root, it might work then but not recommended;
> 2) run everything as regular user with realtime-lsm module loaded and
> properly setup;
> 3) run everything as regular user with pam security rlimits properly set;
> 
> Bye.