[ltp] serial port stays quiet on TP600

[Thomas Hood]

 --- Thomas Vogels <tov@ece.cmu.edu> wrote: > 
> Thomas Hood <jdthood2@yahoo.co.uk> writes:
> 
> > Power on the serial port using "ps2 ser on".
> > 
> > 
> >  --- Peter Hutnick <peter-lists@hutnick.com> wrote: 
> > > Thomas Vogels said:
> > > > I enabled COM1 with tpctl and verified ports (0x3f8) and irq (4).  But
> > > > 'setserial /dev/ttyS0 autoconfig auto_irq' fails to recognize the
> > > > port, the UART is still unknown! The hardware is OK as verified with
> W98.
> > > >
> > > > Any ideas, suggestions?
> 
> 
> Thomas, thanks for pushing me back to ps2...To my surprise, I had to
> power-on AND enable the serial port with ps2.  'ps2 ser on' alone
> didn't help, a 'ps2 sera enable' was also needed!  So somehow tpctl
> failed to enable the serial port in Linux (tpctl changed the state but
> the kernel driver couldn't talk to the port).
> At last I can connect my palm pilot to my laptop :-)
>   -tom

You can't enable or power on the port using tpctl
if it has been powered off with PS2.EXE.

If the port has been powered on with PS2.EXE but disabled,
then tpctl can enable it.

--
Thomas

=====
Linux on ThinkPad 600 page: http://panopticon.csustan.edu/thood/tp600lnx.htm

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