Resolved Dual screens not nice anymore

[Ramius]

I just got my Macbook home from service.
And when I boot up external monitor now, the picture is not sharp.

It used to be much sharper, so why isn´t it now? The resolution is the same.

When I turn off cloned view, the picture on the external screen becomes sharp again, but when I turn it on again, it´s fuzzy.

 

[mulo]

cloned view

theres your answer, turn it off

 

[simsaladimbamba]

The blurry image is due to the MacBook's screen being mirrored:

System Preferences > Displays >> Arrangement >>> Mirror Displays (but know, that the display with the lowest resolution determines the maximum resolution used on both, thus one display will have a lower than native resolution, except when both displays have the same native resolution)

So either use the external display as extended desktop and use its full resolution and get a sharp image, or mirror the MacBook's screen onto the display and live with a blurry image.
If you want to use the external display as main display, you can drag the Menu Bar over to it.

 

[Ramius]

The blurry image is due to the MacBook's screen being mirrored:

System Preferences > Displays >> Arrangement >>> Mirror Displays (but know, that the display with the lowest resolution determines the maximum resolution used on both, thus one display will have a lower than native resolution, except when both displays have the same native resolution)
Image​

So either use the external display as extended desktop and use its full resolution and get a sharp image, or mirror the MacBook's screen onto the display and live with a blurry image.
If you want to use the external display as main display, you can drag the Menu Bar over to it.

Image​

AHHHHHHHHHHHHHH perfect
I was dragging the windows around desperately looking to solve this problem. Never realising I could drag that single white bar out of the one window.

Now everything is crisp again.