The "svgalib" has a tool named "reset_vga". It completely resets your
VGA-card . You may try it... but it's only a workaround at the cause and
not at the symptom.
I used it a longer time ago with a similar problem (only slightly
similar - programmed the VGA-card "by hand", and needed to clear the
scrambled output I produced :-) ).
ciao
Michael
Nix N. Nix wrote:
> The symptom:
>
> Sometimes, when I switch between virtual terminals, (away from X ==
> tty7), instead of getting my usual login prompt, the picture I've had
> during my X session (or the picture of the display manager) stays on
> the screen, albeit with some of the colours screwed up (as if it were
> a 256 colour palette-based display, even though it's 24 bit colour -
> you know, like in Windows, when you have 256 colours and you switch
> from one app to another and the colours in your background picture get
> all frelled up). The terminal does switch over to the appropriate tty
> because I can log in and type whatever (blindly though) and it does
> work.
>
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