[LAU] MIDI keyboard not recognized

[Ralf Mardorf]

On Thu, 2012-09-13 at 21:11 +0200, Nigel Henry wrote:
> No. forget about snd_seq_midi as I've an idea it's only for soundcards that 
> have a hardware synth like my Audigy 2 Soundblaster.
> 
> More important is the usbcore module which Ralf mentions is missing in your 
> lsmod. It's a dependency for snd_usb_audio and I've had someone else in the 
> past where that wasn't loading and caused similar problems to yours.
> 
> So do a:
> sudo modprobe usbcore
> If it doesn't immediately resolve the problem add it on a line in /etc/modules 
> and reboot as it may need to be loaded before snd_usb_audio as it's a 
> dependency. You'll need it in /etc/modules anyway if there's something 
> stopping it being loaded automatically. 

I booted Ubuntu Studio Precise.

spinymouse at precise:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 12.04.1 LTS
Release:	12.04
Codename:	precise
spinymouse at precise:~$ uname -a
Linux precise 3.2.0-23-lowlatency #31-Ubuntu SMP PREEMPT Wed Apr 11 02:24:03 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Connected a KORG nanoKONTROL

spinymouse at precise:~$ lsmod | grep usbcore
spinymouse at precise:~$

QJackCtl's ALSA tab does show "nanoKONTROL"

Disconnected the nanoKONTROL and connected a swissonic USB MIDI IO device

spinymouse at precise:~$ lsmod | grep usbcore
spinymouse at precise:~$

QJackCtl's ALSA tab does show "USB Device"

Reboot

spinymouse at precise:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 12.04.1 LTS
Release:	12.04
Codename:	precise
spinymouse at precise:~$ uname -a
Linux precise 3.0.30 #1 SMP PREEMPT Sun May 6 22:44:54 CEST 2012 x86_64 x86_64 x86_64 GNU/Linux

Connected a KORG nanoKONTROL

spinymouse at precise:~$ lsmod | grep usbcore
spinymouse at precise:~$

QJackCtl's ALSA tab does show "nanoKONTROL"

Disconnected the nanoKONTROL and connected a swissonic USB MIDI IO device

spinymouse at precise:~$ lsmod | grep usbcore

QJackCtl's ALSA tab does show "USB Device"

spinymouse at precise:~$ sudo modprobe usbcore
[sudo] password for spinymouse: 
spinymouse at precise:~$

Both kernels are used with threadirqs. 3.2.0-23-lowlatency is from the repositories, 3.0.30 is a self-build kernel.

So here no usbcore too, but everything is ok.

Regards,
Ralf