There is a standard GNU Emacs module that is often useful for diagnostics.
First, open a shell terminal. Next, type the following to load Emacs:

local:host[ 1 ] $> emacs &

Within Emacs, press Esc-x. Next, type doctor. Press return. You can talk all
about odd-parity and dumb terminals you would like. I believe you are
referring to the light displays on your 2400 baud modem. The dumb terminal
is likely the keyboard, or perhaps a nearby television.


On 1/28/08, David Lawyer <[EMAIL PROTECTED]> wrote:
>
> Package: apt
> Version: 0.7.9
>
> When I use apt-get at a dumb terminal which is set for odd parity
> everything seems OK at first.  But later on after it's fetched
> (downloaded) all the packages and begins with "Reading database" I see
> error characters that indicate that apt has messed with the terminal
> settings for the serial port (using stty or the like) in the computer
> and has disabled odd parity.  The "Reading Database" and everything
> after this (such as setting up packages) is almost unreadable.  So
> characters with no parity are being sent to the terminal and only
> about half of them happen to have odd parity, so only those get
> displayed since the dumb terminal considers any characters with even
> parity to be erroneous and only displays error symbols for them.
>
> Then when apt-get is finished, everything is OK since it must reset
> the terminal interface back to odd parity (It likely saved the
> original settings and then restores them).  The fix is to just not
> to change the parity setting of the interface.  It could be some program
> that apt-get calls that is the culprit.
>
>                        David Lawyer
>
>
>
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