Subject: Re: PPP problems with sup as of 2/20/98
To: Bill Studenmund <>
From: Jeremy Cooper <>
List: current-users
Date: 02/23/1998 11:38:42
On Mon, 23 Feb 1998, Bill Studenmund wrote:

> On Sun, 22 Feb 1998, Sean Brandt wrote:
> > I recompiled kernel and userland on friday, and since then ppp does not
> > work, either in demand, or direct dial never fires off chat, and
> > has to be killed with a sigkill. I've tried with both uvm and not, with
> > serial console and not...Very confused :) Anyone have any ideas to try?
> Either ktrace it, or put in log statements.
> If it dies where pppd hangs up the modem (in pppd/main.c), then it's the
> same problem I ran into just recently. Somehow the TIOCMBIC ioctl is
> causig pppd to hang.

There was a bug recently introduced (and fixed I believe) in the i386
serial port port code which caused certain ioctl() calls to effectively
loop forever.  I'll bet that you (Bill) are certainly hitting it.  It may
be the same case for Sean.