Re: [Jack-Devel] Jack 1.9.7 on ARM crashes when killing a client

On 02/18/2011 12:23 PM, torbenh wrote:
> On Thu, Feb 17, 2011 at 02:01:06PM +0100, Robin Gareus wrote:
[..]
>> 
>> 
>> while you're at it: Would it be unreasonable to ask looking into 
>> ignoring device disconnect?  f.i. have jackd survive and not crash
>> when an interface (eg ALSA-USB) goes away.
>> 
>> No further action should be taken by JACK (well, maybe some
>> hook-script could be invoked or a d-bus command send); some 3rd
>> party software could issue d-bus commands to switch backends.
> 
> i basically did this with tschack. using pyjackd this should be
> working. not well tested, as i dont have an usb soundcard with me
> very often.

I've updated jackdmp and tschack to latest svn/git and check this with a
USB UA-25. annotated logs attached.


	tschack (git 7b7a48d)
terminates with exit 0 if the interface goes away.


	jack2d 1.9.7~svn4120 ( --classic --dbus )
keeps running when the USB/ALSA interface goes away - it no longer
live-locks or crashes. - All JACK clients stall.
With the dbus-version: the backend can be changed. After switching to a
new backend (here: internal card) JACK resumes to run nicely.

After the device had been disconnected, the current port-connections can
no longer be queried (jack_lsp can not connect) until the backend is
re-initialized with `jack_control sm`.
Calling 'switch-master' re-creates the physical output ports and the
information about previous port-connections to the outputs are lost.



Anyway, to come back to the Subject:

svn rev 4119: "Valerio Pilo second CAS for ARMv7 patch." introduces a
problem with jackdbus. All requests time out and it is not possible to
connect to jackdbus at all:
  "JackEngine::ClientActivate wait error ref = 2 name = dbusapi"

reverting the notification behavior in JackEngine.cpp removes that
problem. I assume you may know what's going on; I've just bisected and
not analyzed it.

ciao,
robin

-- 
Robin Gareus
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* Attachment: 'jackd2-svn4120_dbusfix.diff'
content-type: text/x-patch
* Attachment: 'jackd2-svn4120_unplug_device.log'
content-type: text/x-log
* Attachment: 'tschack-7b7a48d_unplug_device.log'
content-type: text/x-log

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