Posted 27 July 2008 - 04:38 PM
Video drivers (as has been said) enable the video card to talk with the OS and send stuff out of the connector in a recognizable format.
Additionally, monitor drivers serve to interpret that signal (through the OS also) so that it's displayed correctly on the monitor.
Most people use a generic monitor driver, so they're unaware of it's use - but video drivers can cause quite a few problems with a system.
It depends on the flash/flicker that you're experiencing whether this is normal or not. I'd suggest checking it by trying your monitor on another computer - if it doesn't do it there, then it's an issue with your computer. If it does it there, then it's an issue with the monitor.
After that, try another monitor and see if it acts that same way - that'll help rule out the monitor as part of the cause.
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