[BRLTTY] BRLTTY with Alva BC640

[Dave Mielke]

[quoted lines by Dominique Asselineau on 2009/09/16 at 22:09 +0200]

>I try to run an Alva BC640 with BRLTTY 4.0 on Debian Lenny, and BRLTTY
>can't start it.  It seems that the Alva braille display is seen as a
>USB stick.  

The Alva BC640 contains a USB stick. It actually contains two USB storage 
devices. Don't worry about Linux detecting them. It's not seeing them instead 
of the braille display, but, rather, it's seeing them because they're there.

Earlier versions of the Alva BC640 firmware and the Linux kernel didn't get 
along very well. The problem has been fixed, though, so a firmware upgrade of 
your Alva may resolve the problem. Which version of the firmware do you 
currently have?

>Here is the part of the /var/log/kern.log concerning this connection:
>
>Sep 16 20:27:54 erode kernel: usb 5-7: new high speed USB device using ehci_hcd and address 22
>Sep 16 20:27:54 erode kernel: usb 5-7: configuration #1 chosen from 1 choice
>Sep 16 20:27:54 erode kernel: hub 5-7:1.0: USB hub found
>Sep 16 20:27:54 erode kernel: hub 5-7:1.0: 3 ports detected
>Sep 16 20:27:54 erode kernel: usb 5-7.1: new full speed USB device using ehci_hcd and address 23
>Sep 16 20:28:04 erode kernel: usb 5-7.1: unable to read config index 0 descriptor/start
>Sep 16 20:28:04 erode kernel: usb 5-7.1: chopping to 0 config(s)
>Sep 16 20:28:14 erode kernel: usb 5-7.1: string descriptor 0 read error: -110

Yes, that's exactly what the problem looks like when the older Alva firmware is 
being used.

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