Changing modes with fbset

I've downloaded fbutils from the CVS and fixed up the source so that 
they work (for the most part).  It reads the modedb and finds the mode I 
requested on the command line.  But when it tries to switch my monitor 
looses sync and the machine hangs.  I did a var.Print instead of the 
var.Set and the values look OK.  Anyone have any ideas?

John




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