[pulseaudio-discuss] strange pulse / jack behaviour

[Richard Bown]

On Thu, 1 Nov 2012 03:58:20 +1100
Patrick Shirkey <pshirkey at boosthardware.com> wrote:

> 
> On Thu, November 1, 2012 3:45 am, Richard Bown wrote:
> > On Thu, 1 Nov 2012 03:08:09 +1100
> > Patrick Shirkey <pshirkey at boosthardware.com> wrote:
> >
> >>
> >> On Wed, October 31, 2012 11:26 pm, Tanu Kaskinen wrote:
> >> > On Mon, 2012-10-29 at 20:59 +1100, Patrick Shirkey wrote:
> >> >> Hi,
> >> >>
> >> >> Does anyone have any thoughts on why the following is happening?
> >> >>
> >> >> Using Debian wheezy on an intel board with built in HDA chipset.
> >> >> (Notebook
> >> >> sound card)
> >> >>
> >> >> I was unable to start jack. It seemed like the problem might have
> >> been
> >> >> because pulse was running so I killed pulse with "pulseaudio -k".
> >> That
> >> >> didn't help.
> >> >
> >> > If you need to keep pulseaudio not running, put "autospawn = no" to
> >> > ~/.pulse/client.conf. Then "pulseaudio -k" actually has the effect
> >> that
> >> > you expect it to have...
> >> >
> >> >> I installed pulseaudio-module-jack and configured
> >> >> /etc/pulse/default.pa to include
> >> >>
> >> >> load-module module-jack-sink
> >> >> load-module module-jack-source
> >> >
> >> > Could you undo all these modifications so that the problem can be
> >> > debugged on a "normal" system?
> >> >
> >>
> >> I have removed those two entries in the /etc/pulse/default.pa
> >>
> >> 3: The current situation is that I cannot run jackd (jack2 -1.9.9) with
> >> "dbus enabled" in qjackctl misc settings window because I get an error :
> >>
> >> ++++
> >> Failed to acquire device name : Audio0 error : Method "RequestRelease"
> >> with signature "i" on interface "org.freedesktop.ReserveDevice1" doesn't
> >> exist
> >> Audio device hw:0 cannot be acquired..
> >> ++++
> >>
> >> 2: I get the same error if I run it from the command line:
> >>
> >> jackd -d alsa -d hw:0
> >>
> >>
> >> 3: If I try to use jackdbus instead of jackd I get this message instead:
> >>
> >> ++++
> >> jackdbus should be auto-executed by D-Bus message bus daemon.
> >> If you want to run it manually anyway, specify "auto" as only parameter
> >> ++++
> >>
> >>
> >> 4: I can run jackd with hw:1 with no problems
> >>
> >> 5: I can run jackd with hw:0 if I kill pulse and run it as superuser
> >> with
> >> "pulseaudio --system -D"
> >>
> >>
> >> 6: Here's the output of  "pactl list modules short" as Richard
> >> suggested:
> >>
> >> ++++
> >> $ pactl list modules short
> >> 0	module-device-restore
> >> 1	module-stream-restore
> >> 2	module-card-restore
> >> 3	module-augment-properties
> >> 4	module-alsa-card	device_id="0" name="pci-0000_00_1b.0"
> >> card_name="alsa_card.pci-0000_00_1b.0" namereg_fail=false tsched=yes
> >> fixed_latency_range=no ignore_dB=no deferred_volume=yes
> >> card_properties="module-udev-detect.discovered=1"
> >> 5	module-udev-detect
> >> 6	module-jackdbus-detect
> >> 7	module-native-protocol-unix
> >> 8	module-default-device-restore
> >> 9	module-rescue-streams
> >> 10	module-always-sink
> >> 11	module-intended-roles
> >> 12	module-suspend-on-idle
> >> 13	module-console-kit
> >> 14	module-systemd-login
> >> 15	module-position-event-sounds
> >> 16	module-role-cork
> >> 17	module-filter-heuristics
> >> 18	module-filter-apply
> >> 19	module-dbus-protocol
> >> 20	module-switch-on-port-available
> >> 21	module-x11-publish	display=:0
> >> 22	module-x11-cork-request	display=:0
> >> 23	module-x11-xsmp	display=:0
> >> session_manager=local/xxxx:@/tmp/.ICE-unix/3709,unix/whare:/tmp/.ICE-unix/3709
> >> 24	module-alsa-card	device_id="1"
> >> name="usb-Yealink_Network_Technology_Ltd._VOIP_USB_Phone-00-Phone"
> >> card_name="alsa_card.usb-Yealink_Network_Technology_Ltd._VOIP_USB_Phone-00-Phone"
> >> namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no
> >> deferred_volume=yes card_properties="module-udev-detect.discovered=1"
> >> ++++
> >>
> >>
> >>
> >> >> restarted pulseaudio with pulseaudio -k ; pulseaudio and it attempted
> >> to
> >> >> start jack server but was not able to. At that point I was unable to
> >> get
> >> >> pulseaudio to start at all or jack so I decided to reboot in case it
> >> was
> >> >> a
> >> >> kernel oops.
> >> >>
> >> >> After rebooting pulseaudio still would not start. I tried a couple of
> >> >> options but in the end I had to run "pulseaudio --system -D" as
> >> >> superuser.
> >> >> After doing that jackd would run from qjackctl but there are not
> >> >> pulse-sink/source connections in jack probably because pulse is
> >> running
> >> >> as
> >> >> superuser but I'm not 100% on the exact reason for this behaviour. I
> >> can
> >> >> see that pulseaudio is running with "ps aux".
> >> >
> >> > I'm pretty sure that the jack stuff won't work if you run pulseaudio
> >> in
> >> > the system mode.
> >> >
> >> > It would be nice if we could start from a clean slate, and get the
> >> exact
> >> > error messages.
> >> >
> >> > --
> >> > Tanu
> >> >
> >> >
> >>
> > Jackd will not start unless it can acquire a device, which has to be free
> > and
> > unused by any other device.
> > If the wanted device is already captured , it must be released before
> > jackd
> > starts.
> > AFAIK pulseaudio has no psychic ability to know that jackd wants the
> > device
> > which it is already using.
> >
> 
> module-jackdbus-detect is supposed to release the lock on the device when
> jackdbus (jackd2) starts and then auto reconfigure and connect to
> jackdbus/jackd2 loading the jack-sink/source modules once jackdbus/jackd2
> has successfully started.
> 
> The problem in this case appears to be that it does not attempt to release
> the lock on the device for some unknown reason.
> 
> 
>
Read what you have written and you will understand why it doesn't.


-- 
-- 
Best wishes / 73
Richard Bown

e-mail: richard at g8jvm.com  




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