Re: [linux-audio-user] Problems with Roland PC-300

On Fri, 02 Dec 2005 18:58, Chris Norris wrote:
> Hi all - I would appreciate if someone is able to help get my Roland
> PC-300 midi keyboard controller to work.
>
> The short problem seems to me that although the keyboard is being
> recognised via USB OK, it is not being correctly/completely identified
> by ALSA.
>
> When I plug it in I get in my system log:
> Nov 28 17:17:57 dukla kernel: usb 3-2: new full speed USB device using
> uhci_hcd and address 3
> Nov 28 17:17:58 dukla kernel: midi: probe of 3-2:1.0 failed with error -5
> Nov 28 17:17:58 dukla kernel: midi: probe of 3-2:1.1 failed with error -5
> Nov 28 17:17:58 dukla kernel: usbmidi: found [ Roland PC-300 ]
> (0x0582:0x0008), attached:
> Nov 28 17:17:58 dukla kernel: usbmidi: /dev/midi00: in (ep:81 cid: 0
> bufsiz:64) out (ep:01 cid: 0 bufsiz:64)

These messages mean that the old OSS-like "usb-midi" driver has been loaded,
taking over the device, which is recognized and probably working with this
driver.

> Nov 28 17:17:58 dukla kernel: usbcore: registered new driver midi
> Nov 28 17:17:58 dukla kernel: usbcore: registered new driver snd-usb-audio

The alsa driver has been loaded too, but it doesn't find a free interface in
the PC-300 to attach.

> Even better, it shows up as a device:
> me@email-addr-hidden:~> cat /proc/asound/cards
> 0 [V8237          ]: VIA8237 - VIA 8237
>                      VIA 8237 with ALC658D at 0xe000, irq 177
> 1 [PC300          ]: USB-Audio - PC-300
>                      Roland PC-300 at usb-0000:00:10.2-2, full speed
>
> And yet I cannot see it as an input ALSA device:
> me@email-addr-hidden:~> aconnect -i -o
> client 0: 'System' [type=kernel]
> 0 'Timer '
> 1 'Announce '
> client 62: 'Midi Through' [type=kernel]
> 0 'Midi Through Port-0'
> client 128: 'FLUID Synth (10018)' [type=user]
> 0 'Synth input port (10018:0)'
>
> I am running SuSE 10.0 x86_64 (kernel 2.6.13-15) which has ALSA
> 1.0.9-23. My skills do not run to kernel compiles: the keyboard does
> work fine under Windows and even
> cat /dev/midi
> shows some garbage at each key press.
>
> Any/all help or suggestions would be very welcome!
> Thanks

You can either:
* Remove the module usb-midi, if you don't need it anymore.
Or
* Add one line at end of your file "/etc/hotplug/blacklist".
To do it, open a terminal window, login as root and enter:
# echo "usb-midi" >> /etc/hotplug/blacklist

Next time you boot the computer, the module "usb-midi" won't be loaded and
your keyboard controller will be driven by ALSA.

There is a diagnostic script to debug ALSA problems here:
http://alsa.opensrc.org/aadebug
Perhaps you would like to run it, before and after, and tell us it this helps.

Regards,
Pedro
Received on Sun Dec 4 00:15:04 2005