FVWM: garbled screen for big outputs

Pierre Frenkiel <[email protected]>
Newsgroups gmane.comp.window-managers.fvwm
Message-ID <[email protected]>
hi everybody,
I don't know whether this list is still alive, but I'll try anyway...
I have the following problem:
When I output more than a few hundreds lines(on stdout or stderr),
my screen becomes garbled, i.e. about half of the screen is covered by
a white window, and I must run "fvwm restart" to recover.
What can be the config item giving that behaviour ?

best regards,
-- 
Pierre Frenkiel
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