[linux-audio-user] midisport snd-usb-audio mysteries

[Hans Fugal]

After much travail, and learning more about udev and hotplug than I ever
wanted to know, it turned out to be an overloaded USB hub. Sheesh.

On Sun, 20 Nov 2005 at 14:45 -0700, Hans Fugal wrote:
> My M-Audio Radium 61 is on the fritz again. With the recent changes in
> udev, where udev replaces hotplug, I had to do some trickery to get the
> firmware to load. When it finally did, it dumped me into a problem I've
> seen many times before: the keyboard is recognized as existing by the
> ALSA sequencer, but there doesn't seem to be any midi data coming from
> it (neither zyn nor aseqview). Unplugging, powering off, etc. yields no
> different result. Converseley, when it's working fine I can unplug,
> power off, etc. and it always comes back just fine. Well, always except
> for the time when it decides to go awol. I've also tried unloading
> snd-usb-audio.
> 
> In the past the problem has been resolved by rebooting, but I'm feeling
> adventurous and don't particularly need to use the keyboard at the
> moment, so I think I'll try to track it down. 
> 
> So my question is, where does the problem most likely lie? Is the
> firmware perhaps not loading properly for some reason? Is something in
> one of the ALSA kernel modules in a strange state? snd-usb-audio, or one
> of the other snd- modules, or maybe the *hci modules?
> 
> -- 
> Hans Fugal ; http://hans.fugal.net
>  
> There's nothing remarkable about it. All one has to do is hit the 
> right keys at the right time and the instrument plays itself.
>     -- Johann Sebastian Bach



-- 
Hans Fugal ; http://hans.fugal.net
 
There's nothing remarkable about it. All one has to do is hit the 
right keys at the right time and the instrument plays itself.
    -- Johann Sebastian Bach
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