[ubuntu-studio-users] ubuntu-studio-users Digest, Vol 100, Issue 4

Edward A Schober ted at schober.us
Thu Aug 13 12:58:40 UTC 2015

When jack runs it starts a process called jackdbus.  If jack fails
jackdbus hangs around as a zombie that needs to be killed before jack
will restart.

*ps -A |grep jackdbus*

You will get response
nnnn   jackdbus   (where nnnn is the process number)

*sudo kill -9 nnnn   *(I didn't check the process level that jackdbus
runs, but -9 kills it!)

Then jack will start just fine if it is setup properly.


On 8/13/2015 8:00 AM, ubuntu-studio-users-request at lists.ubuntu.com wrote:
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> Today's Topics:
>    1.  weird behaviour firewire (bart deruyter)
> ----------------------------------------------------------------------
> Message: 1
> Date: Thu, 13 Aug 2015 09:00:19 +0200
> From: bart deruyter <bart.deruyter at gmail.com>
> To: Ubuntu Studio Users Help and Discussion
> 	<ubuntu-studio-users at lists.ubuntu.com>
> Subject: [ubuntu-studio-users] weird behaviour firewire
> Message-ID:
> 	<CAJV2CrpEb9pJ1+rWiRdG_nQWssnLFM+L+qy2HFnpzXps5zrNog at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
> Hi all,
> I'm running ubuntu 15.04 now, gnome variant, with ubuntustudio and kxstudio
> installed through software sources.
> My soundcard is an Echo Audiofire 12, connected with firewire.
> Since 15.04 when I start jack it works fine as long as I don't run any
> other application which requires sound, before starting jack.
> it is consistently going wrong when I for example start chrome, exit chrome
> and try to start jack, using claudia, or qjackctl, or commandline.
> the message qjackctl throws is: JackServer::Open failed with -1
> When I log out of the system, then log in again (no reboot required) it
> works again, as long as I start jack first.
> Also, when I use chrome while running jack things seem to keep working,
> though I have ben thrown out of jack too.
> - I checked if I was in audio-group, which I am, otherwise it wouldn't work
> at all.
> - I turned autospawn off for pulseaudio and killed pulseaudio befor
> starting jack
> - tried out various settings in qjackctl.
> None seem to have helped.
> How can I trace the source of the problem? If it is a known issue, anyone
> idea's on how to fix this?
> grtz,
> Bart
> http://www.bartart3d.be/
> On Twitter <https://twitter.com/#%21/Bart_Issimo>
> On Identi.ca <http://identi.ca/bartart3d>
> On Google+ <https://plus.google.com/u/0/b/116379400376517483499/>
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