mgetty on null modem

Gert Doering (gert@greenie.muc.de)
Sat, 7 Nov 1998 17:52:47 +0100

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Hi,

On Sat, Nov 07, 1998 at 03:09:35PM +0100, etrius@hem2.passagen.se wrote:
> 11/07 15:03:54 yS1   key: 'term', type=1, flags=0, data=(empty)
> 11/07 15:03:54 yS1  check for lockfiles
> 11/07 15:03:54 yS1   checklock: no active process has lock, will remove
> 11/07 15:03:54 yS1  locking the line
> 11/07 15:03:54 yS1   makelock(ttyS1) called
> 11/07 15:03:54 yS1   do_makelock: lock='/var/lock/LCK..ttyS1'
> 11/07 15:03:54 yS1   lock made
> 11/07 15:03:55 yS1  tio_get_rs232_lines: TIOCMGET failed: Input/output error

That's really unusual.  I'd suspect line noise (disturbances on the DCD
line), or a bad null modem cable.

Maybe it's a bad kernel - did you compile the Linux kernel with gcc
2.7.2.3?  If not, please do so, as other compilers will generate bad code
for 2.0 kernels.

You might want to try "ignore-carrier yes" and "toggle-dtr no" (in
mgetty.config), but I don't think that those would have any effect at
*this* place.

gert
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Gert Doering - Munich, Germany                             gert@greenie.muc.de
fax: +49-89-35655025                        gert.doering@physik.tu-muenchen.de