[BRLTTY] Brltty woes on Centos 7

[Keith Wessel]

I've been poking around at system docs this morning. I'm already using the
After=system-udev-settle.service and Wants=system-udev-settle.service that
you recommended last week, Dave. Makes sense: I don't want brltty to start
until the console interrupt is available and until after udev isn't going to
mess with my serial port's communication parameters.

Clearly, as we discussed on Friday, that's not what's happening. I'm getting
the error when brltty tries to get console control, and the baud rate, as
reported by sty, is changing back to 9600.

I'm happy to have brltty start later so that, when it starts, it actually
has access to what it needs and that things keep working, obviously.

Any thoughts why the system-udev-settle service isn't doing the trick? And
what might?

FWIW, I added these additional wants and after lines to brltty.service
rather than the brltty at .service abstract service unit definition. Was that
the right place to put them?

Keith


-----Original Message-----
From: BRLTTY [mailto:brltty-bounces at brltty.com] On Behalf Of Dave Mielke
Sent: Saturday, March 04, 2017 8:11 AM
To: Informal discussion between users and developers of BRLTTY.
<brltty at brltty.com>
Subject: Re: [BRLTTY] Brltty woes on Centos 7

[quoted lines by Keith Wessel on 2017/03/04 at 07:32 -0600]

>But this sounds like a system issue and not a brltty 5.4 issue, or at least
>not something that needs to be coded around. 

Yes, serial port probing messing up a port's settings isn't anything brltty
can 
do much about. Waiting for udev to settle, though, is, in my opinion, the
right 
way to deal with it.

Maybe there's a way to tell udev (or maybe it's the kernel) not to probe for

modems. That probe is a bit annoying, especially when, these days, few
people 
actually have them.

>Only the console interrupt issue is something I'll await a fix for from you

>all.

Fixing that isn't even, strictly speaking, necessary since, again, waiting
for 
udev to settle resolves it and is the right thing to do. Nevertheless, I do 
still intend to fix it because it indeed is something brltty can (and, 
therefore, should) deal with.

-- 
Dave Mielke           | 2213 Fox Crescent | The Bible is the very Word of
God.
Phone: 1-613-726-0014 | Ottawa, Ontario   | http://Mielke.cc/bible/
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