[BRLTTY] Udev being fussy

[Keith Wessel]

Hi, all,

I recently had the exciting upgrade from my very old but very reliable Power
Braille 80 to a Focus Blue 5th gen 80-cell display. I'm using the display
via USB on my Linux system with brltty, and wow is it ever responsive! I'm
using it via Bluetooth on Windows, and it's so nice to have braille on
Windows again.

Since this new display is so portable, I'm sometimes disconnecting it and
taking it with me, but I find myself having to restart brltty to get it to
re-connect after plugging it back in. This, of course, was because I was
running brltty out of system on start-up, not letting the udev rules start
and stop brltty. So, this morning, I disabled it on start-up, and sure
enough system-udevd did its thing, or so I thought.

My problem is udevd seems to be randomly killing off brltty, even though the
display is still connected. It'll detect and start up brltty but, several
minutes later, it'll terminate. I still haven't found anything conclusive in
the output of systemctl status system-udevd to say why it's killing it, but
I wondered if there might be a known issue or any suggestions from the list
from experience.

After this happens, it doesn't always re-detect the display if I unplug and
re-connect it to the computer. Sometimes, I have to try a few times.

FWIW, I'm running brltty 5.2 on Gentoo.

Any thoughts?

Thanks,
Keith