MIDI Keyboard not working

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Dear all,


I'm running latest Armbian Bionic on Pine64 RockPro64, trying to connect a Midi Keyboard device (having several of them for testing), but it is not recognized by ALSA. 


If I run 

acconnect -l

After connecting the keyboard, it's not listed (same behavior with different keyboards).  


Does anyone possibly knows what module might be missing in the kernel?



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Armbian is a community driven open source project. Do you like to contribute your code?

moved to rockchip 3399 (I think it fits better there).

21 minutes ago, Martin N said:

I'm running latest Armbian Bionic on Pine64 RockPro64



not as 100% clear but this counts here as well:


A support question must include the following:

Board you use

Issue you face

Description of your set-up (e.g. powering, connected hardware, used SD-Card)

'sudo armbianmonitor -u' - this gives us some needed logs which makes debugging a way easier!



we provide a mainline (dev) and a bsp kernel (default) for this board. And their kernelconfigs may differ.


@lanefu we might have to fix the guidelines a bit.  ;)


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thanks for your replies! 


This is a result of "sudo armbianmonitor -u":




If I check "dmesg | grep usb" after connecting the keyboard, I see this:

[  406.619687] usb 8-1: new full-speed USB device number 3 using ohci-platform
[  406.802741] usb 8-1: New USB device found, idVendor=0a4d, idProduct=0090
[  406.802761] usb 8-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  406.802770] usb 8-1: Product: USB Keystation 49e
[  406.802777] usb 8-1: Manufacturer: Evolution Electronics Ltd.

With lsusb I see this device as:


Bus 008 Device 003: ID 0a4d:0090 Evolution Electronics, Ltd Keystation 49e Driver

That looks like the system recognized the device, the "aconnect -l" though doesn't show it in the list.

In standard desktop Ubuntu it works just fine.




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One more correction:


alsa raw tool finds the device, but alsa seq connection manager does not recognize it:


mag@rockpro64:~$ amidi -l
Dir Device    Name
IO  hw:3,0,0  USB Keystation 49e MIDI 1
mag@rockpro64:~$ aconnect -i
client 0: 'System' [type=kernel]
    0 'Timer           '
    1 'Announce        '
client 14: 'Midi Through' [type=kernel]
    0 'Midi Through Port-0'


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1 hour ago, Martin N said:

In standard desktop Ubuntu it works just fine.

You mean Ubuntu on PC? Find out which kernel modules are needed and send a PR with changes to the kernel config (like https://github.com/armbian/build/pull/1283) and wait for update or DIY the kernel with our build tools. And device should work. It could also be the issue, that legacy 4.4.y kernel is too old and drivers or just this hw IDs are missing. 

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