[unix-pc.uucp] tty000 'n' uucico

ditto@cbmvax.UUCP (Michael Ditto) (08/02/88)

In article <14@sialis.Sialis.MN.ORG> rjg@sialis.mn.org (Robert J. Granvin) writes:
>The instant you send the BREAK,
  [ to the OBM ]
>                            tty000 goes out to lunch.  All output to
>the device is buffered, and not sent, and input is not accepted from
>the terminal.  If you don't send a BREAK, the terminal remains
>(apparently) unaffected.
>
>The remote terminal will 'return to life' when the call is complete
>and uucico starts up _another_ call.

I have seen this; it's quite easily reproducable.  In particular, I
often log in via tty000 and "cu" out via ph0.  If I type ~%break to
cu, my terminal (on tty000) freezes (no input or output).  A bit of
experimenting revealed that SETTING the stty settings of ph0 will
cause tty000 to return to life (i.e., going to the console and running
"stty 1200 < /dev/ph0" makes everything work again).

I don't think I knew about the bug when I was covered by warranty,
and my current solution is just to avoid typing ~%break.

>I can't believe that no one else out there has run across this, and I
>find it hard to believe that AT&T has no knowledge of it (even though
>the person(s) on the phone may not have, though).

If you think it will help, I'll call the hotline and complain.

-- 
					-=] Ford [=-

	.		.		(In Real Life: Mike Ditto)
.	    :	       ,		ford@kenobi.cts.com
This space under construction,		...!ucsd!elgar!ford
pardon our dust.			ditto@cbmvax.commodore.com

rjg@sialis.mn.org (Robert J. Granvin) (08/03/88)

>In article <14@sialis.Sialis.MN.ORG> rjg@sialis.mn.org (Robert J. Granvin) writes:

Wow!  This is an OLD (meaning nearly a year) message.  Where did it
resurface?

Anyways, since it usually needs to be hashed out every once in a while
anyways...

>>The instant you send the BREAK,
>  [ to the OBM ]
>>                            tty000 goes out to lunch.  All output to
>>the device is buffered, and not sent, and input is not accepted from
>>the terminal.  If you don't send a BREAK, the terminal remains
>>(apparently) unaffected.
>>
>>The remote terminal will 'return to life' when the call is complete
>>and uucico starts up _another_ call.
>
>I have seen this; it's quite easily reproducable.  In particular, I
>often log in via tty000 and "cu" out via ph0.  If I type ~%break to
>cu, my terminal (on tty000) freezes (no input or output).  A bit of
>experimenting revealed that SETTING the stty settings of ph0 will
>cause tty000 to return to life (i.e., going to the console and running
>"stty 1200 < /dev/ph0" makes everything work again).
>
>> [...]
>
>If you think it will help, I'll call the hotline and complain.

No need to.

This problem is a bug in various drivers on the Unix PC.  The problem
existed under OS 3.5.  What I can't recall clearly anymore is whether
3.51 fixed it.  I don't believe so.  However, installing the 3.51
fixdisks (3.51a kernel) will solve this problem (if not solved by
3.51) as well as a few