🚀 go-pugleaf

My pppd is consistently failing with

	ioctl (PPPIOCSINPSIG): Invalid argument

whatever I do (then dropping carrier, causing the local modem to hang up).
Increasing the kdebug level doesn't give me any more information.

I am running the same distribution of pppd (2.1.2) at both ends, one Linux
and one SunOS 4.1.3.  I have tried using the Linux kernel drivers provided
in that package in lieu of existing kernel drivers (although both claim to be
0.2.7, diffs suggest the latter drivers are newer), but the result is the same.

My local options file currently resembles:

	/dev/cua1
	2400
	crtscts
	modem
	lock
	netmask 255.255.255.0
	mru 552
	defaultroute
	debug
	kdebug 2

I have tried both a chat-based login and a manual cu login (using ~z after
starting remote pppd, then starting local pppd (without 'lock' in the options
file)), and am convinced the remote pppd is behaving properly - it works fine
under Winsock, from the same PC.  The remote pppd log just mentions sudden
loss of carrier.

- Baffled and .sigless