Tecra A2, making it the primary external monitor

I connected an external flat display of 1280 x 1024 on my A2, the extended value desktop and the native resolutions, everything looks "sharp."

But whenever I click on the 'do this (external) monitor the primary monitor' box (then apply...); the external screen goes black and the laptop screen goes back to 640 x 480 resolution...

Before I was perfectly able to do my external screen in primary, but since the 1.30--> 1.40 firmware update it seems more possible... Yet, in my preferences-monitor the appropriate box is clickable. I've also updated the graphics card drivers, but no result better here.

All I can do to make this work as it did before? Which means that all the screens native resolution and the external display being the main with the Windows bar at the bottom? Any help appreciated :-)

Greetings from Holland!

Rin

Hello

Is this the situation even if you use the extended desktop in the properties of the graphics controller Intel?

Tags: Toshiba

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