we hav redhat installed on various pc...at first the screen was blurred so i changed the resolution and also millions of colors then for a while every thing was fine but at the nxt moment the screen started showing vertical parallel bars starting at middle of screen coming towards bottom an it continues.so can any one tell me wats the probs and how to solve it.it has detected the onboard vga card ie..sis 620.is it the problem of monitor as all the monitors are lg studioworks.this probs is on all redhat pcs but not on those with suse installed...

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