after all that said, you were correct in the first place: there's a BUG indeed in v0.9.2 when setting the clock-source over jack d-bus... ouch!
you don't need to upgrade anything as with jackd2 v1.9.17 you'll certainly get the same error :( however it's kinda a no-op error or warning: it's only the clock-source setting that gets overlooked--all the rest seems to work fine though...
so, if you rely on setting the clock-source to anything under jack d-bus you're better use qjackctl v0.9.1 alright! or you may not use jack d-bus interface at all and things might work better in that particular regard (but surely get way more complicated on others like, for example, pulseaudio integration and what not).
not quite... :)
after all that said, you were correct in the first place: there's a BUG indeed in v0.9.2 when setting the clock-source over jack d-bus... ouch!
you don't need to upgrade anything as with jackd2 v1.9.17 you'll certainly get the same error :( however it's kinda a no-op error or warning: it's only the clock-source setting that gets overlooked--all the rest seems to work fine though...
so, if you rely on setting the clock-source to anything under jack d-bus you're better use qjackctl v0.9.1 alright! or you may not use jack d-bus interface at all and things might work better in that particular regard (but surely get way more complicated on others like, for example, pulseaudio integration and what not).
sorry for all the misleading replies.
cheers
[UPDATE:] please test the just arrived hot-fix: qjackctl-0.9.2-47.x86_64.AppImage ;) thanks.