[LAU] MIDI keyboard not recognized

[Nigel Henry]

On Thursday 13 September 2012 19:25, jy wrote:
> 2012/9/13 Nigel Henry <cave.dnb2m97pp at aliceadsl.fr>
>
> > On Thursday 13 September 2012 12:32, jy wrote:
> > > 2012/9/13 Ralf Mardorf <ralf.mardorf at alice-dsl.net>
> > >
> > > > On Thu, 2012-09-13 at 07:38 +0200, jy wrote:
> > > > > and after :
> > > > >
> > > > > $ lsmod | grep snd
> > > > > snd_usb_audio          83446  0
> > > > > snd_usbmidi_lib        22777  1 snd_usb_audio
> > > > > snd_rawmidi            22278  1 snd_usbmidi_lib
> > > > > snd_hda_codec_hdmi     30352  1
> > > > > snd_hda_codec_realtek    95198  1
> > > > > snd_hda_intel          25788  5
> > > > > snd_hda_codec          87980  3
> > > > > snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
> > > > > snd_hwdep              12910  2 snd_usb_audio,snd_hda_codec
> > > > > snd_pcm_oss            39968  0
> > > > > snd_mixer_oss          21707  2 snd_pcm_oss
> > > > > snd_pcm                69043  5
> >
> > snd_usb_audio,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_pcm_os
> >
> > > > >s snd_seq_dummy          12455  0
> > > > > snd_seq_oss            32416  0
> > > > > snd_seq_midi_event     13124  1 snd_seq_oss
> > > > > snd_seq                51504  5
> > > > > snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
> > > > > snd_timer              22187  2 snd_pcm,snd_seq
> > > > > snd_seq_device         12980  4
> > > > > snd_rawmidi,snd_seq_dummy,snd_seq_oss,snd_seq
> > > > > snd                    50814  24
> >
> > snd_usb_audio,snd_usbmidi_lib,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_code
> >
> > >c_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_os
> > >s,
> > >
> > > >snd_pcm,snd_seq_dummy,snd_seq_oss,snd_seq,snd_timer,snd_seq_device
> > > >
> > > > > soundcore              12926  2 snd
> > > > > snd_page_alloc         12841  2 snd_hda_intel,snd_pcm
> > > > >
> > > > >
> > > > > snd_usb_audio loads properly!
> > > >
> > > > Isn't usbcore missing?
> > > > usbcore --> snd_usb_audio,ohci_hcd,snd_usbmidi_lib,ehci_hcd,usbhid
> > > >
> > > > at least snd-usb-audio and ehci-hcd are present (logs testifying it
> > >
> > > available in the thread). so I think usbcore is not missing but i know
> > > snd_seq_midi is.
> > >
> > > jy
> >
> > It seems strange that snd_seq_midi is missing on ubuntustudio 12.04. I've
> > seen
> > a post where it's missing on the remix version of 12.04 though.
> >
> > Try:
> > modinfo snd_seq_midi
> > This should show if it actually does exist or not. If it does, according
> > to some docs on jackd it may need to be forced at bootup. Worth a try, so
> > add snd_seq_midi on one line in /etc/modules then reboot and check lsmod
> > again.
>
> hum bad news
> $ modinfo snd_seq_midi
> ERROR: modinfo: could not find module snd_seq_midi
>
> should i try to get it ?
>
> jy
>
> > Nigel.

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.

All the best.

Nigel.
> > _______________________________________________
> > Linux-audio-user mailing list
> > Linux-audio-user at lists.linuxaudio.org
> > http://lists.linuxaudio.org/listinfo/linux-audio-user