possible bug Jack update

[Shupacabras]

Hi all,
My Ubuntu 14.04 amd64, after

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jackd2 (2:1.9.11~20160620-3~trusty1) to 2:1.9.11~20160620-4~trusty1
libjack-jackd2-0 (2:1.9.11~20160620-3~trusty1) to 2:1.9.11~20160620-4~trusty1

04/august update, ardour4 & qtractor no export audio session

[Shupacabras]

i downgrade to

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jackd2_2%3a1.9.11~20160620-4~kxstudio1_amd64.deb
libjack-jackd2-0_2%3a1.9.11~20160620-4~kxstudio1_amd64.deb

but no longer work
jack render also fails

jack log

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16: ERROR: JackFreewheelDriver::Process: Process error
Thu Aug  4 20:01:07 2016: ERROR: JackFreewheelDriver::Process: Process error
Thu Aug  4 20:01:07 2016: ERROR: JackFreewheelDriver::Process: Process error
Thu Aug  4 20:01:07 2016: ERROR: JackFreewheelDriver::Process: Process error
Thu Aug  4 20:01:07 2016: ERROR: JackFreewheelDriver::Process: Process error
Thu Aug  4 20:01:07 2016: ERROR: JackFreewheelDriver::Process: Process error
Thu Aug  4 20:01:07 2016: ERROR: JackFreewheelDriver::Process: Process error

sorry my bad english

[Shupacabras]

I finally worked

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apt remove jackd2 and libjack-jackd2-2

downgrade to

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jackd2_1%3a1.9.10-1~kxstudio1_amd64.deb
libjack-jackd2-0_1%3a1.9.10-1~kxstudio1_amd64.deb

and reboot