Jack audio not working in Musescore 2.1 on Linuxmint 18.2

• Sep 14, 2017 - 04:03

Hello, The play button, and other transport functions are grayed out and are not selectable when I select Jack Audio Server in Preferences in Musescore 2.1 on Linuxmint 18.2 64bit. (Interestingly, Jack works within Musescore 2.0.3. on the same system) I was unsuccessful with the Musescore 2.1 appimage and snap versions. Using Qjackctl or Cadence to manage Jack made no difference either. Any ideas?

Thanks,
Sam
When I run the following in the terminal:
"env BAMF_DESKTOP_FILE_HINT=/var/lib/snapd/desktop/applications/musescore_musescore.desktop /snap/bin/musescore.mscore"
I get the following error, even through Jack is running "
Qt: Session management error: Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed
initScoreFonts 0x2aafed0
JackAudio()::init(): failed, status 0x1
no JACK server found
no audio driver found
Cannot start I/O
sequencer init failed
Ignore SSL error: 6 The certificate has expired
Creating interface for ScoreView object


Comments

In reply to by Sambaji

I have been learning about this since yesterday:

  1. this error: "Session management error: Authentication Rejected, reaso..." is related to using X Display Server with terminal. Sometimes "su - " is enough.

  2. QT related part is related to SESSIONMANAGER environment. Sometimes, moving the ".cache" of your home directory (eg: "mv .cache .cache-old") can solve the problem.

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