(PortMIDI hang on Mac) - Empty Project always hangs on first note entry

• Jul 30, 2019 - 13:52
Reported version
3.2
Type
Functional
Frequency
Once
Severity
S2 - Critical
Reproducibility
Always
Status
needs info
Regression
No
Workaround
No
Project
MuseScore

Open the attached empty project, click on any measure and type a note letter name. After about 0,5 seconds, the beach ball starts spinning, MS must be force-quit and restarted (Mac OS 10.13).

Attachment Size
instant_hang.mscz 5.87 KB

Comments

• Jul 30, 2019 - 14:07
Title Empty Project always hangs on first note entry ⇒ Empty score always hangs on first note entry
Status active ⇒ needs info

Works just fine for me, Windows 7, MuseScore 3.2.3 (same version as you)

Reply

• Jul 30, 2019 - 14:10
Title Empty score always hangs on first note entry ⇒ Empty Project always hangs on first note entry
Status needs info ⇒ active

Works just fine and as expected here (Win10, 3.2.3)
To be sure, please try first: menu "Help" -> Revert to Factory Settings (before, save custom palettes/shortcuts, if you have)
Once this is done, tell us what the behaviour is.

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• Jul 30, 2019 - 16:42

Elsewhere you mention portmidi, making my think the issue may have to do with your I/O or synthesizer settings, or there may be an incompatibility with some device driver on your system. S these are all things you can try investigating to help provide more information.

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• Jul 30, 2019 - 16:58

My MIDI config didn't change, is not set to a feedback loop, and shouldn't cause one. But it seems that if the MIDI device I have selected as the input device in MS is not turned on, I get these hangs. I'll keep testing to try to verify this.

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• Jul 30, 2019 - 17:07

It's repeatable, so PortMIDI does seem to be the cause:

  1. go to Preferences and select an existing, connected MIDI input device for input
  2. select an IAC Bus for output. (I haven't determined if this is necessary, this is what I do)
  3. quit MuseScore
  4. disconnect the MIDI device selected for input in step 1
  5. restart MuseScore

Now when I type in a note, MuseScore hangs. If I quit and connect the input device and restart, the problem disappears.

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