Arch Linux

schef

Member

Registered: 2009-04-16

Posts: 71

[SOLVED] teensy USB midi don't exist on kernel upgrade

i tryed aconnect -iol and teensy wasn't there.
that was after linux-3.19.2-1-x86_64.pkg.tar.xz upgrade (i did the reboot)
but after downgrade to linux-3.18.6-1-x86_64.pkg.tar.xz it works again.

Last edited by schef (2015-04-13 18:52:00)

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [SOLVED] teensy USB midi don't exist on kernel upgrade

Compare the messages generated in dmesg and/or your journal under each kernel when you connect the device, see if you can spot any relevant differences.

schef

Member

Registered: 2009-04-16

Posts: 71

Re: [SOLVED] teensy USB midi don't exist on kernel upgrade

Ok i did dmesg under both but they look the same:

[   99.325545] usb 3-1: USB disconnect, device number 2
[  106.130832] usb 3-1: new full-speed USB device number 5 using xhci_hcd
[  106.309017] hid-generic 0003:16C0:0485.0003: hidraw0: USB HID v1.11 Device [Teensyduino Teensy MIDI] on usb-0000:00:14.0-1/input1

and

[   24.631927] usb 3-1: USB disconnect, device number 2
[   29.425505] usb 3-1: new full-speed USB device number 5 using xhci_hcd
[   29.601865] hid-generic 0003:16C0:0485.0003: hidraw0: USB HID v1.11 Device [Teensyduino Teensy MIDI] on usb-0000:00:14.0-1/input1

looks the same to me.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,263

Re: [SOLVED] teensy USB midi don't exist on kernel upgrade

Its a known regression with 3.19.2 there are multiple threads about this already, should be fixed with 3.19.3

schef

Member

Registered: 2009-04-16

Posts: 71

Re: [SOLVED] teensy USB midi don't exist on kernel upgrade

It's still not working.

schef

Member

Registered: 2009-04-16

Posts: 71

Re: [SOLVED] teensy USB midi don't exist on kernel upgrade

Now tried with testing/linux 4.0.1 and still not working.

schef

Member

Registered: 2009-04-16

Posts: 71

Re: [SOLVED] teensy USB midi don't exist on kernel upgrade

Found the anwser on the wiki. "Note: As of kernel 3.19.2 you might also need to manually load module snd_seq_midi. Bug report FS#44286".
Marking as solved.