> On 02 Nov 2015, at 09:56, Johan <[email protected]> wrote:
> 
> But when I try to use QT_AUTO_SCREEN_SCALE_FACTOR and set it to 1 nothing 
> happens. Should not this equal setting QT_SCALE_FACTOR to 2 since I have set 
> Windows to display in 200%?

Yes, I think it should.

> Any hints on how to debug this?

Try looking at QHighDpiScaling::initHighDpiScaling() and  
QHighDpiScaling::updateHighDpiScaling(). The latter should eventually make a 
call to QWindowsScreen:: pixelDensity() which I would expect to return 2 in 
your case.

Morten
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