Ubuntu – Can’t activate “mirror display”

display-managerintel graphics

I have Ubuntu 12.04 on a Dell latitude E6410, I have a problem when using the VGA output I always have dual monitor and can't switch on the "mirror display" toggle under systems setting/displays. It's rather annoying when having to do presentation with a video projector. the option "mirror display" is in light grey and I can"t tick the box.

Thanks for those who might have an idea how to resolve this?

driver is: IntelĀ® Ironlake Mobile x86/MMX/SSE2

card something like this ?
description: VGA compatible controller
product: Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
width: 64 bits
clock: 33MHz

Best Answer

It's possible (though i'd see it as rather improbable) that your displays have no unified resolution, as in, there is no resolution the system can set and display on both at once.

Usually, though, there are several "fallback" resolutions, such as 1024 x 768. While most displays are superior to this now, they will still work at this resoltuion if told to.

Check your options for each screen resolutions, and see if there are any matching.

It's possible setting it manually may help, although both of mine allowed me to tick the box and then automatically limited my resolution options (which is also stated below the checkbox).

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