[BRLTTY] focus display hangs with brltty 5.0

[Dave Mielke]

[quoted lines by Sebastian Humenda on 2014/03/06 at 13:30 +0100]

>BRLTTY 4.5 also shows some USB warnings, when called with -v:
...
>brltty: USB interface in use: 0 (usbfs)

This particular log usually means that you have more than one brltty process 
trying to access the same device.

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