[64studio-devel] device names randomising on startup

[Steve A]

hello,

This happens in all versions, I think.

I have a PCI soundcard + onboard soundcard.  On startup, the system will 
allocate randomly which card becomes /dev/dsp and which becomes /dev/dsp1.

This causes problems with Jack not starting because the device locked into 
jack's config is no-longer the intended one.

Also,in 1.3.7 I have seen my Edirol midi keyboard controller (ID'd as "PCR") 
become the output device for jack ! (Jack did not start unsuprisingly)

Now I know what is happening, the random and mysterious "jack won't start" 
messages make sense.

Same problem occurs with /dev/*midi* allocations.  This causes problems 
where the /dev/*midi* device is hard-coded in the config , such as with a 
synth called beatrix.

I've read this is UDEV behaviour by design and can be overcome by 
hard-mapping device hardware ID's to specific /dev/ nodes.

Can anyone confirm that udev is the cause and the solution?

May be worth writing this up in the FAQ?  I'll document the udev changes I 
have to make.

s~

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