FW: Re: [PlanetCCRMA] Jack: Cannot get realtime capabilities

R Parker rtp405@yahoo.com
Wed May 11 07:08:01 2005


--- Mike Jewell <msjmsj49@hotmail.com> wrote:
> Thanks for the tip, Fernando.  Works great.  If I
> had just used jackd like I 
> had been doing all along, I would not have even know
> that jackstart doesn't 
> work.
> 
> Can you can explain why there is even a "jackstart"
> command if it is doing 
> the same thing as "jackd -R"?

jackstart enables normal users on 2.4 kernels to
acquire -R capabilities.

ron

> Thanks again for your help and for the great Planet
> CCRMA site/apps.  It's 
> been a lifesaver for me the last year.
> 
> Mike
> Mike Jewell
> 
> 
> 
> >From: Fernando Lopez-Lezcano
> <nando@ccrma.Stanford.EDU>
> >To: Mike Jewell <msjmsj49@hotmail.com>
> >CC: planetccrma@ccrma.Stanford.EDU
> >Subject: Re: [PlanetCCRMA] Jack: Cannot get
> realtime capabilities
> >Date: 09 May 2005 17:35:14 -0700
> >
> >On Mon, 2005-05-09 at 17:05, Mike Jewell wrote:
> > > Fedora Core 3
> > > Pentium 4
> > > Kernel: 2.6.10-2.1.ll.rhfc3.ccrmasmp
> > >
> > > Hi CCRMA listers,
> > >
> > > This is my first post here.  I've been using the
> Planet for a year now 
> >with
> > > Fedora Core 1 and I recently upgraded to Core 3
> largely so I could get 
> >the
> > > realtime Linux Security Module.  But when I run
> Jack it still complains 
> >that
> > > it can't get this.  (See output below)
> >
> >Under 2.6.x it will complain but will work
> anyway...
> >
> > > Is this something I still need to "enable" in
> some way even though the
> > > Planet web site says this kernel has it
> included?
> >
> >Under 2.6.x just use "jackd" directly instead of
> "jackstart".
> >-- Fernando
> >
> > > Thanks in advance for any help you can offer
> this relative newbe trying 
> >to
> > > "do" Linux.
> > >
> > > Mike
> > > Mike Jewell
> > >
> > >
> > >
> > > $  jackstart -R -d alsa -d hw -r 44100
> > > jackstart: cannot get realtime capabilities,
> current capabilities are:
> > >            =ep cap_setpcap-ep
> > >     probably running under a kernel with
> capabilities disabled,
> > >     a suitable kernel would have printed
> something like "=eip"
> > >
> > > back from read, ret = 1 errno == Success
> > > jackstart: could not give capabilities:
> Operation not permitted
> > > jackd 0.99.36
> > > Copyright 2001-2003 Paul Davis and others.
> > > jackd comes with ABSOLUTELY NO WARRANTY
> > > This is free software, and you are welcome to
> redistribute it
> > > under certain conditions; see the file COPYING
> for details
> > >
> > > JACK compiled with System V SHM support.
> > > loading driver ..
> > > apparent rate = 44100
> > > creating alsa driver ...
> hw|hw|1024|2|44100|0|0|nomon|swmeter|-|32bit
> > > configuring for 44100Hz, period = 1024 frames,
> buffer = 2 periods
> > > nperiods = 2 for capture
> > > nperiods = 2 for playback
> > >
> > >
> > > _______________________________________________
> > > PlanetCCRMA mailing list
> > > PlanetCCRMA@ccrma.stanford.edu
> > >
>
http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> >
> >_______________________________________________
> >PlanetCCRMA mailing list
> >PlanetCCRMA@ccrma.stanford.edu
>
>http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> 
> 
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>
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