Bug#430542: debian-installer: screen updates painfully slow on serial console
Op 25-06-2007 om 14:49 schreef Marcus Better:
> Package: debian-installer
> Severity: wishlist
> I'm installing etch on a sparc system through serial console. Sun
> machines apparently use 9600 baud on the serial port. The screen
> update method of the installer makes this process really slow.
> The screen is drawn about three times for each new page. First the
> background is filled, then the dialog box is drawn on top of that, and
> finally the whole thing is erased with a third pass when the dialog is
> The screen blanking and background drawing are really unnecessary, it
> should be possible to optimize them away.
You are right, for your situation. And you are right for other 9600
baud serial installs that use the newt frontend. The Debian-installer
team did allready his best to avoid such installs.
The used technique checks for a installer-kernel-start-parameter "console=some_serialport"
and switches to the readline frontend, which doesn't use the whole screen.
On a Sun, that itselfs switches console to serial port when no keyboard is
present, has that check for serial console no effect, it keeps the newt
Starting the installer with parameter 'console=ttyS0,9600n8' appended,
will get the desired effect.
Hope this helps