[LAU] Jack frequently crashes when running LinuxSampler + Qsynth

[Guru Prasad B. R.]

Thanks, Arnold, for the heads-up on this particular kernel. I found it 
to hang on two occasions (and I haven't had it for that long either).
I'm not too familiar with PPAs... (am reading up right now). I assume 
you meant that I should follow the instructions on this page: 
https://launchpad.net/~ubuntustudio-dev/+archive/ppa
and then choose the right realtime kernel package from synaptic, or 
command line. Am I correct?

Jörn, my apologies,  I realised that I haven't answered all your 
questions - my frames/period is 256, periods/buffer is 2,  sample rate 
is 44100, giving me a latency of 11.6 sec. While typing this, I noticed 
a parameter 'Timeout', which is currently 500 msec. The only "error" 
message says something about timeout and linuxsampler - so I was 
wondering whether I can change this parameter to a 'safer' level. What 
does this 'timeout' parameter mean? The qjackctl popup says "Set client 
timeout in milliseconds", but I didn't quite follow. What happens if 
this parameter is too high, or too low?

Also, I've noticed that the realtime kernel + Icewm option *does* reduce 
the crash frequency by a huge margin, something which I did not make 
clear in my last mail. However, the realtime kernel hung twice on one 
occasion (before a live perfomance), forcing me to switch to the generic 
kernel, and the crash happened during the performance (does not help 
increase my fanbase.. :(). On the whole, I cannot confidently rely on 
the linux setup until there is some failsafe in place, and I'm convinced 
that it is very, very unlikely for a crash to happen during a live 
performance.
Looking forward to suggestions/pointers/questions.
Thanks in advance!
Cheers,

Guru


Arnold Krille wrote:
> On Monday 19 October 2009 13:10:15 Guru Prasad B. R. wrote:
>   
>>   Sorry, I forgot to mention the following:
>> - I'm running the Ubuntu realtime kernel: 2.6.28-3-rt
>>     
>
> I found that this kernel is rather unstable both with nvidia and without. I 
> use the ones from the ubuntu-studio ppa and that works way better...
>
> Arnold
>   
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-- 
Guru Prasad B.R.
Centre for Ecological Sciences 
Indian Institute of Science
Bangalore - 560 012
India
Ph:+91-80-22933103