This seems like bad advice. A little bit of Googling for solutions to this found this thread[1] which identified (old) Dell monitors as being one of the problem

This seems like bad advice. A little bit of Googling for solutions to this found this thread[1] which identified (old) Dell monitors as being one of the problems. [1] https://embdev.net/topic/284710 https://embdev.net/topic/284710