Path: utzoo!utgpu!water!watmath!clyde!rutgers!mit-eddie!uw-beaver!tektronix!uunet!w3vh!rolfe
From: rolfe@w3vh.UUCP (Rolfe Tessem)
Newsgroups: comp.unix.microport
Subject: Re: system panics
Keywords: uport panic System V/AT
Message-ID: <322@w3vh.UUCP>
Date: 27 Mar 88 15:35:21 GMT
References: <315@w3vh.UUCP> <382@wsccs.UUCP>
Organization: W3VH Packet Radio Gateway, Great Barrington, MA
Lines: 39

In article <382@wsccs.UUCP>, terry@wsccs.UUCP (terry) writes:
> In article <315@w3vh.UUCP>, rolfe@w3vh.UUCP (Rolfe Tessem) writes:
> > Recently, I downloaded the new, improved serial port driver from the
> > uport BBS in the hope that it would cure my system panic problems. It
> > didn't.  I generally poll for news and mail twice a day, once in early
> > evening, and once between 5 and 5:30am.  The system panics invariably
> > occur during the morning uucp activity, generally after some news and/or
> > mail has been successfully queued, but before all the transfers are
> > complete.
> 
> Does it happen with the modem online?  Are you using an internal modem, or is
> DTR forced true?
> 
> Sounds like you have the System V driver bug where the system sees carrier
> drop, but the modem does not hang up the phone, or is immediately called back.

As I mentioned in the original article, I'm already using
the improved uport serial driver, which is supposed to cure
the rmsd panic problem. 

But after tearing my hair out over this, I believe I tracked
it down to a serial board problem.  I'd been using a "dumb"
MS-400 4-port serial board, with only the two stock ports
and interrupts enabled.  After swapping it out and replacing
it with a "standard" two serial port plus parallel port
card, the system has been up for a week now without
burping.  So, at least circumstantially, I'm ready to
believe that it was a hardware and/or interrupt problem.

For the record, I'm using a MAXUM 2400 baud Hayes clone,
with DTR following correctly.  All other hardware is pretty
vanilla, and I am running the production release of
DOSMerge.

-- 
UUCP:  {uunet}!w3vh!rolfe		| Rolfe Tessem
ARPA:  w3vh!rolfe@uunet.UU.NET		| P.O. Box 793
PACKET RADIO: W3VH@WA2PVV		| Great Barrington, MA 01230
IP ADDRESS: 44.44.0.1			| (413) 528-5966