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I recently installed Ubuntu Studio for the first time a few days ago. I did not get around to even testing any audio software on it for the first few days as I was troubleshooting other problems, customizing my desktop, etc. So when I realized that JACK did not work, I assumed that it still worked out of the box in a fresh Ubuntu Studio install, and that something must have gone wrong with the system when I installed or updated other packages.

I just performed a fresh reinstall in order to test this and it still is not working, out of the box.

Here are the messages I am getting from qjackctl: https://pastebin.com/1S6DS5B1

Prior to reinstalling Ubuntu Studio, I attempted killing jackd and jackdbus processes and starting jack from the command line, rather than from qjackctl, but it did not help (neither did disabling DBUS or killing pulseaudio).

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  • Use qjackctl to start and stop JACK server. qjackctl must be set to correct sound device before use. qjackctl in Studio has d-bus enabled by default, to control Pulseaudio and JACK sharing audio devices
    – nik gnomic
    Dec 21, 2017 at 10:11
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    I actually have since resolved the issue and also discovered why none of the traditional JACK fixes worked: It was just a matter of my laptop's internal hardware being incompatible (and apparently this is a common issue with this hardware). External audio interfaces have all worked fine. For future reference, in case it helps anyone having the same issue, my internal audio information is card 0: PCH [HDA Intel PCH], device 0: ALC256 Analog [ALC256 Analog]
    – angel
    Dec 22, 2017 at 14:26

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