help w/ qjackctl locks-up X/GUI (perhaps caused by dbus or kernel 2.6.32.11-99.fc12.x86_64)

[Niels Mayer]

qjackctl-0.3.6-1.fc12.x86_64, when run out of my son's account on his
computer causes the entire X/Gnome GUI to "hang" until qjackctl is killed
remotely.
Using the same account, running qjackctl w/ remote X display set to my
computer causes my X/Gnome GUI to "hang" until qjackctl is killed.

qjackctl runs fine on my computer and also runs fine from my account on my
son's computer.

Although the hardware on the computers is different (Opteron 1220 vs
PhenomII 965, difft mobos) the "music" hardware controlled by jack is the
same -- M-audio delta-66 and an Emagic MT4 USB midi box.

The debugging I've done so far indicates the lockup is caused by dbus. The
problem is, I can't even change parameters in qjackctl on my son's account,
because bringing up qjackctl locks up the computer. Are there any other
files I should consider resetting -- given that, for the same computer, my
config files "work" whereas his account results in a instant lockup on use
of qjackctl.

Where does qjackctl store it's setup? Any suggestions on what config-files I
can hand-edit to get things working again for his music-making? I'm
considering reverting to the previous kernel to see if that's what caused
the breakage. This worked fine prior to updates done recently, including a
new kernel update.

Niels
http://nielsmayer.com

PS: I did notice some oddities with this new kernel. For example, one time
on my box, my Emagic MT4 usb midi started up with a different set of lights
on than usual, and never actually went into "USB" mode. Unplugging and
replugging got it recognized, and likewise rebooting again -- worked fine.
This has not happened prior to update to one of these kernels:
http://koji.fedoraproject.org/koji/search?terms=kernel-2.6.32.11-99.fc12&...

http://koji.fedoraproject.org/koji/search?terms=kernel-2.6.32.10-92.fc12&...

http://koji.fedoraproject.org/koji/search?terms=kernel-2.6.32.10-90.fc12&...

[PlanetCCRMA] help w/ qjackctl locks-up X/GUI (perhaps caused by dbus or kernel 2.6.32.11-99.fc12.x86_64)

[Fernando Lopez-Lezcano]

On Mon, 2010-04-12 at 11:00 -0700, Niels Mayer wrote:
>  qjackctl-0.3.6-1.fc12.x86_64, when run out of my son's account on
> his
>  computer causes the entire X/Gnome GUI to "hang" until qjackctl is
>  killed remotely.
>  Using the same account, running qjackctl w/ remote X display set to my
>  computer causes my X/Gnome GUI to "hang" until qjackctl is killed.
>  
>  
>  qjackctl runs fine on my computer and also runs fine from my account
>  on my son's computer.
>  
>  
>  Although the hardware on the computers is different (Opteron 1220 vs
>  PhenomII 965, difft mobos) the "music" hardware controlled by jack is
>  the same -- M-audio delta-66 and an Emagic MT4 USB midi box.
>  
>  
>  The debugging I've done so far indicates the lockup is caused by
>  dbus. The problem is, I can't even change parameters in qjackctl on my
>  son's account, because bringing up qjackctl locks up the computer. Are
>  there any other files I should consider resetting -- given that, for
>  the same computer, my config files "work" whereas his account results
>  in a instant lockup on use of qjackctl.
>  
>  
>  Where does qjackctl store it's setup?  
~/.config/rncbc.org/QjackCtl.conf

Try removing it and restarting qjackctl...

I think the latest qjackctl has dbus support (for using the dbus enabled
jack builds if you do one) but I don't know how that may be locking up
everything. 

-- Fernando

[PlanetCCRMA] help w/ qjackctl locks-up X/GUI (perhaps caused by dbus or kernel 2.6.32.11-99.fc12.x86_64)

[Niels Mayer]

On Mon, Apr 12, 2010 at 3:45 PM, Fernando Lopez-Lezcano <
nando(a)ccrma.stanford.edu&gt; wrote:

>  > Where does qjackctl store it's setup?
>
>  ~/.config/rncbc.org/QjackCtl.conf
>
>  Try removing it and restarting qjackctl... 

That fixed it! (after resetting all parameters to former values).

Thanls! (I have the saved lockup-causing QJackCtl.conf file incase anybody
wants it for debugging).

-- Niels.
http://nielsmayer.com