[BRLTTY] Brltty sounds absence with sof-firmware driver used on Linux

[Dave Mielke]

[quoted lines by Vsevolod Popov on 2022/01/09 at 16:54 +0300]

Hi:

>This display has routing keys to move to braille cells, panning buttons,
>Perkins keyboard and the rest of the keys are regular keyboard computer keys,
>like escape, tab, capslock, shift, control, function, windows, alt, f-keys,
>home, end, page up, page down, insert, delete, arrow keys which can work as
>moving to next and previous lines.

Does it have 2 (one on each side) or 4 (two on each side) panning keys?

>The display can be used in 2 modes. The braille display mode when keys work
>with screen reader as a regular braille display and a usb/bluetooth hybrid
>keyboard mode which sends commands as regular keyboard when activated.

Do chords (space + dots) work in the second mode?

>Here is the log. I hope that it was saved correctly. When executing a command
>there was the message that intpkts and outpkts categories weren't found.

I can see in the log that they weren't typed correctly - intpks should've been inpkts and ,outpks should've been outpkts. Perhaps you could correct and recapture.

>Here is the file. 

Thanks.

>I assume that a braille display is represented as Selvas
>HealthCare manufacturer, as far as I remember that something like that was in
>there manual, but I am not sure.

No, that one is the keyboard. The braille display is defined very poorly. The chip clearly wasn't customized:

   Its manufacturer string is "Generic Manufacturer (PROTOTYPE--Remember to change idVendor)".
   Its product string is "Generic Serial (PROTOTYPE--Remember to change idVendor)".
   Its serial number string is "00000000-0000-0000-0000-000000000000".

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