I have a 4k 15.6' laptop and an external monitor FHD 22 inches. The problem is that the laptop screen I need to scale to improve readability due to the extremely high density of each pixel. Unfortunately the external monitor is scaled with the same ratio once I do so. Each monitor instead should have a separate scaling factor to be entered through the Displays application.
Thanks for the bugreport! Have you tried the mechanism described here: http://doc.qt.io/qt-5/highdpi.html#high-dpi-support-in-qt ? (It's not reflected in the KScreen UI, in that sense, the bug is valid. You may be able to work around it, though.)
*** Bug 380096 has been marked as a duplicate of this bug. ***
Created attachment 110445 [details] Monitor Scaling Issues All screens use scaling of 2 with no option to change. Top screen is FHD, bottom is QHD.
This is a problem in 5.12.0 as well. I have a Dell XPS 13 (9360) Developer Edition with the QHD (4k) display. DPI is 144, I set scaling to 2. When a FHD (1080p) monitor is connected, the external monitor is also scaled at 2. There is no option in the Displays Settings Module to change scaling per-display. This would be a major quality of life improvement for those who use docks and external monitors. I have attached a screenshot of the issue. The top monitor is the FHD monitor scaled at 2. KDE Plasma Version: 5.12.0 KDE Frameworks Version: 5.42.0 Qt Version: 5.9.3 Kernel Version 4.13.0-32-generic OS Type: 64-bit
Thanks for the report! This isn't supported on X11, and we're not planning to. The Wayland session already has this feature, I'd suggest to consider moving to Wayland.
(In reply to Sebastian Kügler from comment #5) > Thanks for the report! > > This isn't supported on X11, and we're not planning to. The Wayland session > already has this feature, I'd suggest to consider moving to Wayland. Good to know, thanks. :)