For some unfathomable reason the 7" touchscreen has rectangular pixels.
I can't imagine why anyone thought this was a good idea. It makes it useless as a device that has to display an image of anything unless you like distorted images.
Is it possible correct by scaling the video output from the Pi?
I am almost certain it is, but I haven't a clue what the magic spell would be.
I'd imagine deep in the bowels of xorg.conf, is away of telling it that the display is bent.
Mmm. After a few minutes probing, it looks like there is a 'Displaysize' directive in Xorg.conf that takes two parameters - the X and Y pixels per inch.
Edit (or create) /etc/X11/xorg.conf and put in this
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