Dear Amol
Normally a mother boards gets +5V, -5V, +12V, -12V supply from the SMPS. It
could happen that these voltages are not fully achieved i.e you may get +10V
or -9V. Now it depends on the OS to recognize wheather it is Logic high or
Logic low condition for the interface to work. Normally serial port works
with +12V and -12V. It is possible that the SMPS is not giving proper -12V.
Assuming it is -10V though Windows recognizes it as proper com port but
Linux does not. The problem cannot be with +12V as your CDROM drive, Hard
disk drives works ok.
Hope this help.
Vaibhav
>
> Boy, you are spot on. I do have an genuine Intel 440 BX
>Motherboard.
>I don't understand what the relation is. Weird if you ask me. I will give
>it
>a shot. Could you do me a favour? Please ask that H/W engineer what is the
>logic behind the solution.
>Amol
>----- Original Message -----
>From: Syed Khader Vali <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Sunday, October 31, 1999 9:27 AM
>Subject: Re: [LI] Modem problems
>
>
> > On Fri, Oct 29, 1999 at 10:37:21PM +0530, Amol Gokhale wrote:
> > => I have narrowed down the problem. It's my com2. Does'nt work
>under
> > => Linux. Doesn't matter what you put on it, modem mouse. Any body know
>why a
> > => perfectly good com port can work under one os & not work under the
>other.
> > Hello there,
> > >From what you say, It looks like you have a genuine Intel 440BX
>motherboard
> > or whatever. This motherboard seems to have a problem with the port
>thingy
> > at least in Linux, it had some problems. I dunno about windows.
> > Can you check out with your hardware dealer and have the SMPS changed
> > ( well that was what our guy did to make it work, god knows what
>relation
> > they have ;-)
> >
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