Losing ssh connection during apt upgrade

[Colin Law]

On Sun, 31 Jan 2021 at 11:56, Ralf Mardorf via ubuntu-users
<ubuntu-users at lists.ubuntu.com> wrote:
> ...
> ..."The setterm utility issues terminal recognized escape codes to
> alter the terminal. Essentially it just writes/echos the terminal
> sequences to the current terminal device, whether that be in screen, a
> remote ssh terminal, console mode, serial consoles, etc."
> ^^^^^^^^^^^^^^^^^^^
>

So your belief is that if I open a Gnome Terminal on machine A and
then ssh into machine B and run a script in machine B, that something
that is sent back to the terminal could blank the display (not just
the terminal window) that is running Gnome terminal?

In addition Bo Bergaland believes (I think) that a problem with the
screensaver on machine B prevented him restoring the display on
machine A so eventually he had to pull the power.

Colin