window contents scaling option per-display

[Michael]

In the unity control center design panel, the window content scaling is missing a very important option: "per-display"

Background:
My primary notebook display is a 4k monitor with high dpi. External monitors are often only 1080p monitors. Because I can't scale the displays accordingly to their dpi, windows on one display are very small and the other one are big.

Only offering effectively basically 3 options, biggest-control-area, smallest-control-area and according-to-one-display is not enough. It is much needed to be able to control the window scaling according to the display it is currently in.

A window's anchor point should decide which scaling factor is applied. This would not prevent falsely scaled windows to clip into other displays, but it would be very much appreciated by multi monitor users.

Ubuntu version:
Description: Ubuntu 16.04.1 LTS
Release: 16.04

unity-control-center:
  Installiert: 15.04.0+16.04.20160705-0ubuntu1

Related bugs:
https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1294578
https://bugs.launchpad.net/ubuntu/+source/unity-control-center/+bug/1297053

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Cassidy James Blaede (cassidyjames)]

This is a limitation of X, not Unity.

[Michael (mickare)]

At the moment I bypass it by scaling (increasing) the resolution of the output device via "xrandr". This works fine, but it costs more performance and is not persistent at the cost of running a script after each login.

So if X does not support the window scaling (and probably never will), then the control panel could support resolution upscaling.

By the way: The unity control panel does not support scaled output devices. It displays in the display position view the real output resolution, but not the scaled one.