1864243 - WebMIDI not working in snap package

Status: RESOLVED FIXED

(Firefox Build System :: Third Party Packaging, defect)

Description

[Nikolaos Anastopoulos]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/119.0

Steps to reproduce:

This issue concerns the Firefox snap package. Even though MIDI devices are successfully connected and used by other applications, visiting any site using the WebMIDI API fails to enumerate the available MIDI devices.

An example site is: https://webmidi-examples.glitch.me/

Actual results:

Calling navigator.requestMIDIAccess() immediately fails with the console message "Silently denying site request for MIDI access because no devices were detected. You may need to restart your browser after connecting a new device."

Expected results:

The MIDI devices should have been enumerated through the WebMIDI API.

Comment 1

[Nikolaos Anastopoulos]

Here's a potential patch: https://github.com/canonical/firefox-snap/pull/36

Comment 2

[:gerard-majax]

Thanks, for the patch, you should probably submit the same for all branches, but usually we first merge them to nightly

Comment 3

[:gerard-majax]

(In reply to Nikolaos Anastopoulos from comment #1)

Here's a potential patch: https://github.com/canonical/firefox-snap/pull/36

Is it enough or other changes might be required ? I dont have a MIDI device to verify

Comment 4

[Nikolaos Anastopoulos]

Is it enough or other changes might be required ?

To be honest I'm not very familiar with snapcraft and I couldn't really test this. Based on this post, there might be one more step that we need to take in order for this to work. Happy to test any builds with real hardware.

I dont have a MIDI device to verify

Maybe try with ALSA virtual MIDI devices?

$ sudo modprobe snd-virmidi snd_index=1
$ amidi -l                             
Dir Device    Name
IO  hw:4,0    Virtual Raw MIDI (16 subdevices)
IO  hw:4,1    Virtual Raw MIDI (16 subdevices)
IO  hw:4,2    Virtual Raw MIDI (16 subdevices)
IO  hw:4,3    Virtual Raw MIDI (16 subdevices)

Comment 5

[Nikolaos Anastopoulos]

(In reply to :gerard-majax from comment #3)
(In reply to Nikolaos Anastopoulos from comment #4)

[...] Based on this post, there might be one more step that we need to take in order for this to work.

Sorry, I meant this post: https://forum.snapcraft.io/t/the-alsa-interface/7766/7

Comment 6

[BugBot [:suhaib / :marco]]

The severity field is not set for this bug.
:gerard-majax, could you have a look please?

For more information, please visit BugBot documentation.

Comment 7

[:gerard-majax]

Attachment: GitHub Pull Request

Comment 8

[:gerard-majax]

This is fixed on nightly already and it's going to be merged soon on other branches.

Thanks Nikolaos for the patch!