Reducing resolution and/or refresh rate and/or color depth is no options since this is already at an all time low. Perhaps refresh rate could to the trick. Other alternative is using one output (CRT1 or CRT2) only. But ideally this should all be taken care of automatically and/or my primary screen should switch off when I press special function button on my laptop.
This explains the flashing lines on primary screen when using also an external monitor: www.winischhofe r.net/linuxsisp art1.shtml# 13
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Reducing resolution and/or refresh rate and/or color depth is no options since this is already at an all time low. Perhaps refresh rate could to the trick. Other alternative is using one output (CRT1 or CRT2) only. But ideally this should all be taken care of automatically and/or my primary screen should switch off when I press special function button on my laptop.