[Jack-Devel] Sudden Pulseaudio Faulure reported due to jack

[liebrecht at grossmann-venter.com]

I cannot get answers on general usergroups about this error.
Pulseaudio fails with the well known grays screen of death when you open 
mixer in pavucontrol.

"http://i.imgur.com/dIW5uul.png"

Running pulseaudio -vv I print the error containing excerpt of -vv which 
seems to point to jack.

$] pulseaudio -vv

I: [pulseaudio] module.c: Loaded "module-role-cork" (index: #20; 
argument: "").
I: [pulseaudio] module.c: Loaded "module-filter-heuristics" (index: #21; 
argument: "").
I: [pulseaudio] module.c: Loaded "module-filter-apply" (index: #22; 
argument: "").
W: [pulseaudio] module-jack-sink.c: JACK error >Cannot connect to server 
socket err = No such file or directory<
W: [pulseaudio] module-jack-sink.c: JACK error >Cannot connect to server 
request channel<
X11 connection rejected because of wrong authentication.
Connection Error (/usr/bin/dbus-launch terminated abnormally with the 
following error: Autolaunch error: X11 initialization failed.
)
W: [pulseaudio] module-jack-sink.c: JACK error >jack server is not 
running or cannot be started<
W: [pulseaudio] module-jack-sink.c: JACK error 
 >JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock<
W: [pulseaudio] module-jack-sink.c: JACK error 
 >JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock<
E: [pulseaudio] module-jack-sink.c: jack_client_open() failed.
E: [pulseaudio] module.c: Failed to load module "module-jack-sink" 
(argument: ""): initialization failed.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Failed to initialize daemon.
I: [pulseaudio] module.c: Unloading "module-filter-apply" (index: #22).

Any idea how to fix this?
It all started with bluetooth audio.