USB MIDI Problems on Chrome OS

[Andreas Grässer]

Hi there

For some reason using USB MIDI equipment is not possible on ASUS Flip C302CA.

I've tried with DRC and G-Stomper (which both work on other Chromebooks), and both apps just freeze when accessing the MIDI over USB.

Used hardware/software:

Chromebook: 

ASUS Flip C302CA, Chrome OS 71.0.3578.94 (Android N).

Google Pixel, Android P

MIDI Devices:

AKAI LPD8 Wireless

ESI MIDIMAN II

Roland UM-ONE MK2 (switched to tablet)

Apps:

MIDIScope

G-Stomper

DRC

All MIDI devices are recognized and shown by MIDIScope and G-Stomper, but for some reason, the devices show up without any device information except the device name (see attached screen shots).

Also, there's always a "#1, Midi Through[0]" device reported in Chrome OS (there's no such a thing on a normal Android device).

MIDIScope can select the actual devices (listed above), but does not receive any MIDI events.

G-Stomper freezes as soon as it tries to open the USB MIDI device(s). DRC does open, but freezes immediately.

Interesting is that this occurs over USB only. When I connect the AKAI LPD8 Wireless over BLE with G-Stomper or by using the BLE MIDI Connect app, then it works without any problem.

Same applies to the Acer Chromebook 14 cb-431 (reported by a user).

All MIDI devices listed above work without any problems on real Android devices using exactly the MIDI implementation.

Any help would be appreciated. 

Thanks in advance.

[Phil Burk]

Hello Andreas,

Thanks for the report. I filed an internal bug with the Android/Chrome team

    b/122597948 | ARC++ MIDI freezes on ASUS Flip C302CA

Phil Burk

[Andreas Grässer]

Thanks a lot for taking care of it, Phil.

[Andreas Grässer]

Hi Phil

Are there any news here?

Is someone taking care of that issue?

Andreas

On Wednesday, January 9, 2019 at 8:44:15 PM UTC+1, Phil Burk wrote:

[Phil Burk]

This bug is marked as fixed internally.

I am trying to find out when the fix will be available for verification.

--
You received this message because you are subscribed to the Google Groups "android-midi" group.
To unsubscribe from this group and stop receiving emails from it, send an email to android-midi...@googlegroups.com.
To post to this group, send email to androi...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/android-midi/1a05811e-12b0-4966-932b-8f496ee07d3d%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Andreas Grässer]

That's good news, thanks a lot.

Hope it'll go live soon.