Re: [LI] Modem problems

["Amol Gokhale" <gamol@xxxxxxxxxx>]

Hi Vaibhav,

        Thank you for a prompt reply. It was clear, lucid & has answered all
my questions. It also gave me all the answers I needed to get my power
supply replaced by my hardware vendor. Thanks & keep it up.

Amol
> 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 <sidcarter@xxxxxxxxxxxx>
> >To: <linux-india@xxxxxxxxxxxxxxxxxxxxx>
> >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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