Ubuntu Studio & Qsampler

[holotone at gmail.com]

Sweet - I'll give it a shot as soon as I get home - Thanks again!

~holotone

On 11/12/07, Chris Dawson <xrdawson at gmail.com> wrote:
>
> strace is "system call trace."  It simply runs a program within a
> harness that outputs all the system calls made.  In this case, it will
> output and tell you where the jackd program is dying.  In my case I
> saw that it was dying when it tried to open and write to the
> directory.
>
> It is absolutely harmless to run strace, it just outputs a lot of
> extra information you probably won't understand, but would be useful.
> If you'd like run it and send me the output.  You can do this:
>
> strace -ooutput.txt /usr/bin/jackd -R -u -dalsa -dhw:0 -r44100 -p1024 -n2
> &
>
> Then, it'll either die on its own, or you'll need to run:
>
> killall -9 strace jackd
>
> ...to kill it.  Then, send me the output.txt file and I can look for
> something suspicious.  Or, you can check it out youself and perhaps
> you can figure it out.
>
> Chris
>
> On Nov 12, 2007 8:56 PM, holotone at gmail.com <holotone at gmail.com> wrote:
> > My output shows exactly the same permissions:
> >
> > holotone at iceman:~$ ls -l /dev | grep shm
> > drwxrwxrwt 2 root   root          40 2007-11-12 10:31 shm
> >
> > Not sure I understand what strace is, and I'd hate to start executing
> > commands that I don't understand.
> >
> > Thanks for your help!
> >
> >
> >
> > ~holotone
> >
> > On 11/12/07, Chris Dawson <xrdawson at gmail.com> wrote:
> > > Oh, you know what, I recall that when I upgraded Ubuntu-Studio did not
> > > properly set the permissions of /dev/shm, the shared memory directory.
> > > Can you verify the permissions of that?  Mine is
> > >
> > > cdawson at djavan:~$ ls -l /dev | grep shm
> > > drwxrwxrwt 2 root   root          40 2007-11-12 14:37 shm
> > >
> > > Does yours show the same?
> > >
> > > You might also run jack under strace, like so:
> > >
> > > strace /usr/bin/jackd -R -u -dalsa -dhw:0 -r44100 -p1024 -n2
> > >
> > > I think this is where I discovered it could not open the shm directory
> > > and create files there.
> > >
> > > Chris
> > >
> > > On Nov 12, 2007 5:29 PM, holotone at gmail.com <holotone at gmail.com>
> wrote:
> > > > holotone at iceman:~$ uname -r
> > > >
> > > > 2.6.22-14-rt
> > > >
> > > > Yup, looks like I'm good to go - Wonder why I can't enable realtime?
> > > >
> > > > Thanks!
> > > >
> > > > ~holotone
> > > >
> > > >
> > > >
> > > > On 11/12/07, Chris Dawson <xrdawson at gmail.com> wrote:
> > > > > If I recall correctly, by default my upgrade did not include the
> > > > > realtime kernel.  I had to apt-get that myself, and then when I
> > > > > rebooted I could run jack with realtime.  See if that works for
> you.
> > > > > You can see if you have the realtime kernel by doing this:
> > > > >
> > > > > cdawson at djavan:~$ uname -r
> > > > > 2.6.22-14-rt
> > > > >
> > > > > If you don't see rt, then you are not running realtime.
> > > > >
> > > > > Chris
> > > > >
> > > > >
> > > > > On Nov 12, 2007 4:18 PM, holotone at gmail.com <holotone at gmail.com>
> > wrote:
> > > > > > So I bit the bullet this weekend and chose Ubuntu Studio for my
> > Gutsy
> > > > > > upgrade and... Wow! Seriously well done..! I can finally feel
> > confident
> > > > > > using Linux as my primary music production OS..!
> > > > > >
> > > > > > One question, one gripe, and one solution:
> > > > > >
> > > > > > Question: How do I enable realtime in jack? From my
> understanding,
> > > > Ubuntu
> > > > > > Studio includes the realtime kernel, but whenever I check the
> > realtime
> > > > box
> > > > > > in Jack, it won't start - Any ideas?
> > > > > >
> > > > > > Gripe: I looooove the theme with a few exceptions, the largest
> of
> > which
> > > > is
> > > > > > being able to see the fine lines between devices and apps in
> > qjackctl's
> > > > > > connections panel. Any suggestions for a fix?
> > > > > >
> > > > > >  Solution: I couldn't for the life of me get Qsampler to work -
> Kept
> > > > saying
> > > > > > every time I started it that "Server could not be started". A
> bit of
> > > > > > research turned up that linuxsampler, the sampler that Qsampler
> is a
> > GUI
> > > > > > front end for, is not included w/ Ubuntu* due to licensing
> issues.
> > Some
> > > > more
> > > > > > digging around turned up these Ubuntu debs for linuxsampler:
> > > > > >
> http://ubuntu2.cica.es/ubuntu/ubuntu/pool/universe/l/linuxsampler/
> > > > > >
> > > > > > One quick double click and qsampler is now working flawlessly!
> > Perhaps
> > > > there
> > > > > > should be a note about this somewhere? It took me aages to
> figure
> > out.
> > > > > >
> > > > > > Thanks again for putting together a great distro!
> > > > > >
> > > > > > --
> > > > > > ~cole
> > > > > > http://holotone.net/
> > > > >
> > > > >
> > > >
> > > >
> > > > --
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