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Date:      Mon, 28 Jan 2002 20:56:19 +0100 (CET)
From:      BOUWSMA Beery <freebsd-user@dcf77-zeit.netscum.dyndns.dk>
To:        freebsd-stable@freebsd.org
Subject:   Weird wedge with ep0 ethernet and dhclient
Message-ID:  <200201281956.g0SJuJp05869@beerswilling.netscum.dyndns.dk>

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Serwus

I've been semi-consistently having my machine freeze up in a weird
way when attempting to run /sbin/dhclient when the Cabal Modem is
connected to an ep0 3Com 3C509 card.  When I connect instead to the
xl0 card in the same machine, I have no problems at all.  I'm just
partially looking into this now, if someone else wants to try this
and see if I'm full of hot air, or what.

The first time I tried this after going multi-user with both the
ep0 and xl0 card installed, I think the machine froze, but an
attempt to switch consoles (Alt-F?) resulted in the block cursor
disappearing, but nothing more.  Scroll lock and such keys toggled
the LEDs, but I couldn't switch consoles.  I could get into the
debugger, from which I *could* switch consoles (which I've never
tried in normal operation so I don't know if it means anything),
but upon `c'ontinuing, things were wedged again.

I'm pretty sure that I was able to break into the debugger when
I set things up to run dhclient on ep0 as part of the boot, which
otherwise seemed to hang forever.

Then I pulled out the xl0 card.  After going multi-user, I had no
problems the one time I used dhclient to configure ep0.  Honest.
But when I tried to use an identical config file as part of the
boot process, whammo -- wedge city.

Today I thought I'd try a different machine, and a different slot
to boot (same machine model, though, which a friend was eager to
throw away though I've had no unresolvable problems so far).  The
same wedges at boot happen, and I can't get into the debugger (but
it's also a different kernel which *should* have DDB and should be
otherwise very similar).

What I still haven't done is to swap the card into a completely
different make of machine and see if I get the same wedges, or if
it's a problem with the one particular old 1994-vintage machine
I'm using (Digital Venturis 575).  I won't rule out a 3C509-card-
specific hardware problem too, given that it's an ISA card and my
friend who gave it plus the two Digital PCs to me has had much
unluck with hardware.

Anyway, I just thought that I'd mention that under a fresh -stable
I'm seeing this problem, and I'll be looking more at it (at least,
juggling hardware) to see if it's a Real Problem or just some odd
hardware quirk.

More later, like anyone cares


thanks
barry bouwsma


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