[ltp] Using TP as serial console

[Jay Lyerly]

Here's a shot in the dark....

Don't most of the thinkpad's have 1 serial port which shows up as
/dev/ttyS0?  You seem to be accessing /dev/ttyS1.  Other things to try
are 'statserial /dev/ttyS0' and 'setserial /dev/ttyS0'.  statserial
should show you the data lines on the serial port.  If it errors with no
output, the serial port is misconfigured.  If you get output, you could
try send some data in the serial port (if that's possible in your case)
and see if the statserial display changes.  setserial shows you what the
kernel thinks the parameters for the port are (irq, i/o port, etc.). 
Make sure these jive with the actual settings.

hth,
jay


berman@watson.ibm.com wrote:
> 
> Hi,
> 
> I'm trying to use a TP 770X as a serial console and am having trouble reading from the
> serial port.  I'm trying to use minicom.  /etc/minirc.dfl is:
> 
> # Machine-generated file - use "minicom -s" to change parameters.
> pr port             /dev/ttyS1
> pu baudrate         9600
> pu bits             8
> pu parity           N
> 
> But nothing seems to be arriving.  I've taken a serial cable/null modem
> and attached
> them to the com devices on my office machine, and I've been able to type
> to one device and read from the other.  When I move the cable to the TP,
> I see nothing.
> 
> I assume I've got my IRQs/ports screwed up, but I don't know how to
> proceed.  I have disabled
> the IR device in order to get my PCMCIA modem working.
> 
> Can anyone help me with this?
> 
> Thanks.
> --Len
> 
> PS - the contents of /proc/interrupts is:
> 
>            CPU0
>   0:     952345          XT-PIC  timer
>   1:      10523          XT-PIC  keyboard
>   2:          0          XT-PIC  cascade
>   3:      86727          XT-PIC  ibmtr_cs
>   5:          0          XT-PIC  Crystal audio controller
>  5:          0          XT-PIC  Crystal audio controller
>   8:          2          XT-PIC  rtc
>  10:          4          XT-PIC  i82365
>  12:     120238          XT-PIC  PS/2 Mouse
>  13:          1          XT-PIC  fpu
>  14:      20315          XT-PIC  ide0
>  15:          4          XT-PIC  ide1
> NMI:          0
> 
> --
>    ------------------------------------------------
> Len Berman                         berman@watson.ibm.com
> IBM Research                       (914)784-7353
> 30 Saw Mill River Rd
> Hawthorne, NY 10520
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