[Ubuntu | MIDI] PortAudio options are empty and application crashes

• Jan 25, 2020 - 19:20
Reported version
3.3
Type
Functional
Frequency
Many
Severity
S3 - Major
Reproducibility
Always
Status
active
Regression
No
Workaround
Yes
Project
MuseScore

Hi. MuseScore doesn't recognize my MIDI keyboard (Roland JV-50) because the PortAudio options are empty.

When I select PortAudio and press OK button, the application crashes.

OS: Ubuntu Core 18 (Ubuntu 19.10).
Arch.: x86_64.
MuseScore version (64-bit): 3.3.4.
Revision: 7684abe.

I've test the same MIDI keyboard with the same USB device (UM-2G MIDI) on a Windows 10 virtual machine and MuseScore recognizes it, I can use it.

Thanks.

Attachment Size
Captura de pantalla de 2020-01-25 20-17-12.png 71.13 KB

Comments

• Mar 14, 2020 - 17:08

Can confirm, I am also seeing this exact issue (with a Kawai keyboard). When run in a terminal, the failing log line is:

mscore: src/hostapi/alsa/pa_linux_alsa.c:1454: BuildDeviceList: Assertion `devIdx < numDeviceNames' failed.

I can successfully see data coming in from the keyboard by using amidi, so Ubuntu's sound stack is detecting it correctly.

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• May 26, 2020 - 00:26
Workaround No ⇒ Yes

I have the same problem. No MIDI input and selecting PortAudio crashes the program. I have gotten it to work using this command line in terminal:

    musescore3 -a alsa

Not sure why this works. Alsa is not selected in the Preferences, Pulse Audio still is. In my attempt to get it to work, I tried reloading PortAudio and Alsa, but not sure I accomplished anything, since I am not an expert in Linux.

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