[BRLTTY] brltty crashing shortly after starting

[Dave Mielke]

[quoted lines by Mike Gorse on 2015/12/01 at 09:03 -0500]

>I am trying to test the development version of brltty. When I plug in
>my Brailliant 40, brltty starts up. I'm confused as to what is
>starting brltty, since nothing in /usr/lib/udev/rules.d references it
>(I don't have the udev rules file installed at the moment). 

Can you check with ps to see if brltty is already running before you connect 
your device?

>brltty starts but attempts to divide by 0 shortly afterwards.
>Backtrace attached 

Excellent! Thanks.

Are you also able to capture a debug log? Doing this via the command line may 
be difficult if you're not sure what's actually starting brltty/ Perhaps, 
however, you could set log-level and log-file in brltty.conf:

   log-file /path/to/logfile
   log-level debug,brldrv

>(I also don't understand why some values are optimized out, since the build 
>log indicates that I'm passing -O0). 

How are you passing in -O0? The default build option is -O2.

>It looks as though placeBrailleWindowHorizontally is being called when 
>textCount = 0. 

Yes. That shouldn't happen, although I guess it is. That's why I'd like to see 
if a debug log might offer any hints.

>If I start brltty manually, by typing "brltty" from a shell, then it
>works fine. 

Could you also please send a copy of your preferences file?

>Starting brltty via systemctl is not working for me, but I'm unsure if this is 
>related to the crash I just mentioned.

Maybe the systemd service unit for brltty hasn't been installed. Do you get any 
error messages when you try systemctl start?

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