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Mirror display not using the whole screen.

jgbhardy

jgbhardy

macrumors 6502
Original poster
Oct 15, 2008
287
0
England
I have an Early 2008 Macbook connected to a 22" 1680x1050 display. When I set it to mirror the display and set it to the full resolution of 1680x1050 it only uses about 16" of the external display, when i set the resolution to 1280x800 on the external display it then uses all of the display.
When I don't mirror the displays it uses all of the display in full resolution.
Is there anyway to solve this so that i can use it to mirror the display but use all of the screen!
 
jgbhardy said:
I have an Early 2008 Macbook connected to a 22" 1680x1050 display. When I set it to mirror the display and set it to the full resolution of 1680x1050 it only uses about 16" of the external display, when i set the resolution to 1280x800 on the external display it then uses all of the display.
When I don't mirror the displays it uses all of the display in full resolution.
Is there anyway to solve this so that i can use it to mirror the display but use all of the screen!
Click to expand...

Your MacBook screen's resolution is 1280x800. A mirror of 1280x800 is 1280x800. A good analogy would be looking at yourself in the mirror. You don't look taller, shorter, fatter, skinner. Same thing here.
 
SnowLeopard2008 said:
Your MacBook screen's resolution is 1280x800. A mirror of 1280x800 is 1280x800. A good analogy would be looking at yourself in the mirror. You don't look taller, shorter, fatter, skinner. Same thing here.
Click to expand...

Not quite. The Mac is actually outputting the signal to the larger monitor for the native resolution and drawing black except in the center. This will avoid distortion caused when an LCD comes off its native resolution. Disabling overscan should tell the Mac to not bother with that and just output whatever resolution is used by the smaller display. Your LCD should compensate for the lower resolution signal and stretch the picture.
 
geoffreak said:
Not quite. The Mac is actually outputting the signal to the larger monitor for the native resolution and drawing black except in the center. This will avoid distortion caused when an LCD comes off its native resolution. Disabling overscan should tell the Mac to not bother with that and just output whatever resolution is used by the smaller display. Your LCD should compensate for the lower resolution signal and stretch the picture.
Click to expand...

How do you disable overscan?
 
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