Subject: Re: solution for garbage characters problem...
To: None <M.Drochner@fz-juelich.de>
From: Markus Kurek <kurek@etecs5.uni-duisburg.de>
List: port-i386
Date: 08/10/1999 18:25:36
>
> bstark@siemens-psc.com said:
> > To get rid of the garbage screen simply edit /etc/rc.conf and change
> > the default value for wscons from NO to YES. Then restart your system.
> > That's it. There are no changes necessary for /etc/ttys, /etc/
> > wscons.conf, /etc/rc.wscons, or even the kernel.
>
> I think I've found the reason behind this:
> The X servers don't save the whole text memory of a VGA card but only the
> first 4096 characters. This is enough for standard text screens located at
> the begginning of the text memory.
> pccons did only use the first 4k, so there was no problem. More advanced
> drivers like pcvt and wscons/vga optimize scrolling by moving the screen
> origin around in text memory instead of copying the contents. Since pcvt
> creates 8 virtual screens per default and the screen switching saved
> and restored the screen contents anyway, it was not noticed if the X server
> didn't restore the contents on exit.
I get garbage if I configure wscons to 80x50.
If I switch back with ALT+F? to a screen configured to 80x50
all I can see are vertical lines all over the screen.
A bug in wscons ?
--
Markus Kurek