[Gllug] set serial port irq

[Ben Fitzgerald]

On Mon, Apr 19, 2004 at 04:22:35PM +0100, Doug Winter wrote:
> On Mon 19 Apr Ben Fitzgerald wrote:
> > I'm connecting using minicom from box 1 to mgetty on box 2.
> > I don't get a login: prompt!
> 
> I doubt that you want mgetty as is, that's for modems.  use getty (or
> run mgetty as getty, or use the -r switch to mgetty).

I did wonder about that. I've added -r into inittab now.
> 
> check that your getty is really being spawned from the inittab.  it
> often isn't by default.

It's being spawned alright.
> 
> check that you have the following set correctly at both ends:
> 
>     baud rate
>     stop bits
>     parity
>     flow control

When you say check these, do you mean by comparing setserial output
or by comparing values in 
minicom config vs. /etc/mgetty+sendfax/mgetty.config?

setserial's output is the same for both and the values in the other
two files are also the same.

This is the output of /var/log/mgetty.log.ttyS0 after killing
mgetty (thus inittab respawns). Debug level is 8:

04/19 16:41:33 yS0  mgetty: experimental test release 1.1.30-Dec16
04/19 16:41:33 yS0  check for lockfiles
04/19 16:41:33 yS0   checklock: stat failed, no file
04/19 16:41:33 yS0  locking the line
04/19 16:41:33 yS0   makelock(ttyS0) called
04/19 16:41:33 yS0   do_makelock: lock='/var/lock/LCK..ttyS0'
04/19 16:41:33 yS0   lock made
04/19 16:41:33 yS0   tio_get_rs232_lines: status: RTS DTR
04/19 16:41:33 yS0  WARNING: DSR is off - modem turned off or bad cable?
04/19 16:41:33 yS0  lowering DTR to reset Modem
04/19 16:41:34 yS0   tss: set speed to 115200 (10002)
04/19 16:41:34 yS0   tio_set_flow_control( HARD )
04/19 16:41:34 yS0   waiting for line to clear (VTIME), read:
04/19 16:41:34 yS0   waiting for line to clear (VTIME), read:
04/19 16:41:34 yS0   removing lock file
04/19 16:41:34 yS0  waiting...

is the "DSR is off" a problem?

> are you sure you have the right cable?

I've been passed it by a colleague who tells me it's a null-modem
cable! It's an RJ-45 to DB-9 female an all in one cable. The rj-45
end has an adapter that converts to a com port. The adapter has
no markings except the interface has the pin numbers on it. These
are the same as the other end. The only difference is that one
has "l" on the face, the other "DD" (?). Perhaps this has significance
to others?

It's actually on this page:
http://www.cisco.com/warp/public/701/14.html

The third last cable, numbered 72-3383-01

> > Typing AT<cr> doesn't get a response either.
> 
> unless you have a getty that talks the Hayes command set (which you
> don't :) that's not going to help.

Right, I'll cut that out then.

> hitting return a few times can help wake up getty though.

Unfortunately that doesn't have an effect either for a login
prompt or an entry into the mgetty logfile.

Sorry to come back negative but I believe your "mgetty -r"
suggestion has helped, so many thanks,

Ben
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