dirty screen

[Jerry Geis <geisj@xxxxxxxxxxxxxxx>]

Is there a command that marks the screen as "dirty" and hopefully 
redraws it?

If I do a control ALT F1 and the F7 this in effect redraws the screen.
I am getting video artifacts that I think is in the nvidia driver.
the switching console works - I was just hoping there is a more 
convenient way.
some command or something.

Thanks,

Jerry

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