[lug] ppp dial up server with RH7.2

D. Stimits stimits at idcomm.com
Wed Jan 30 11:31:33 MST 2002

Hobbs: Nobuki Matsui wrote:
> Thank you for your suggestion; I did not doubt the serial port.
> These are my current settings below...
> localhost:nobuki {109} sudo setserial -a /dev/modem
> /dev/modem, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
>         Baud_base: 115200, close_delay: 50, divisor: 0
>         closing_wait: 3000
>         Flags: spd_normal skip_test

This looks right, but the trick is that the system view of this serial
port must match in other places. Now take a close look at /proc/pci,
find the modem, compare parameters that are visible/obvious. Also
consider lspci -vvv, look for modem settings as seen by the pci bus (I
am assuming this modem is PCI; if not, perhaps ISA jumpers apply). Also,
if this is PCI, be sure your bios is set to the equivalent of "O/S is
NOT plug-n-play aware". This will cause the bios to do initial setup of
PCI hardware (but linux can still change it). PCI setup will be
consistent across reboots, unless you move cards in their PCI slots.

D. Stimits, stimits at idcomm.com

> N Matsui
> On Tue, 29 Jan 2002, D. Stimits wrote:
> > Hobbs: Nobuki Matsui wrote:
> > >
> > > Dear all,
> > >         I am trying to set up a ppp dial-up server with RH7.2.  I had a
> > > success with RH6.1 before, however it does not work with RH7.2 with the
> > > same settings.  I searched the webs for a solution and I started wondering
> > > if it is a 2.4 kernel issue...  There are some bugs as to ppp in the 2.4
> > > kernel as far as I found, using google.  All the garbage in the log file
> > > and LCP Timeout suggests the computers are having a hard time
> > > negotiating.  Apending 'EXPECT ~' line to the chat.scr would give me a
> > > normal login.
> > >         I wonder if anybody has any suggestions.
> >
> > The last couple of times I had LCP timeout, I had to run setserial to
> > make sure the serial port and the rest of the system had the same idea
> > of what was there. In particular, I used almost the same as the default
> > parameters, but added the spd_normal and skip_test, plus specified
> > specifically the 16550A uart. Note that "setserial -a
> > /dev/whatver_the_modem_is" will give you current settings.
> >
> > D. Stimits, stimits at idcomm.com
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