Bug#667616: brltty greedily grabs serial ports, ftdi_sio loses connection

[Samuel Thibault <sthibault@debian.org>]

Hello,

Mariusz Gronczewski, on Thu 13 Oct 2016 13:06:22 +0200, wrote:
> Looks like it came from installer:

Ok, that makes sense.

> in what circumstances installer starts brltty ?

When udev detects a usb device looking like a braille device. The
problem is that we have a few generic entries: 0403:6001, 10c4:ea60,
and 10c4:ea80.  Braille devices using them are quite common, so we do
want to detect them.  We thought it would be fine doing so from the
installer, but apparently you had your device plugged at that time.

> My guess is that installer detected "braille" device (my usb<->1wire
> converter was plugged into that machine during install) on install and
> decided to install the package.

Yep.

> So the problem should go away if detection is correct.

Yes.  I have now uploaded version 5.4-3 of brltty which additionally
matches the manufacturer id, so that should shrink the issue a lot.

> IMO *if* braille device was detected but not used at all during
> install it it should ask if package should be installed

If it was not used during install, there is usually no use to install
brltty :)

Samuel