When attempting to scale KDE using the slider in system settings, it does absolutely nothing. None of the applications that I use scaled at all. I rebooted several times, checked the scaling in ~/.config/kdeglobals and still no scaling. Everything on my HiDPI display is unreadable. Reproducible: Always Steps to Reproduce: 1. System Settings > Display and Monitor > Scale Display 2. Slide slider to some value 3. Reboot Actual Results: Nothing happened. Everything is still as unreadable as before. Expected Results: Text / font, icons, menus, etc. would've scaled. Everything would be readable. Laptop model: Lenovo YOGA 3 Pro Resolution: 3200 x 1800 Versions: Display configuration: 5.5.5 KDE Frameworks: 5.18.0 Qt: 5.5.1
Thanks for the report! Could you try our latest version, preferably even the unstable tree? You can download the dev/unstable flavor of KDE Neon (neon.kde.org) and test with that. I haven't seen this problem in a while, so before I start debugging, I need to know if it's even present in the latest release.
I suffered the same before in KDE neon user edition, but didn't check it in a while. I'll check it again and report the result here (I won't be able to test the dev version, sorry, as this is a production system).
It doesn't work properly for me yet in KDE neon user edition (it might be fixed in dev edition though). So far best way I can get a nice display is by forcing the font dpi.
Qt is currently limited to integral scaling factors, so there should be a difference, if you set the factor to 2.0. Non-Qt applications are not affected by this setting.
I tried with 1.4, so that must be it. I think a factor 2 is too big for my system, so I rather keep it as it is for now... Any plan of allowing for lower scaling factors?
Yes, but that will need support throughout the stack.
Updating to KDE Frameworks 5.6.5, scaling DOES scale icons! Font/text still wouldn't scale, but I'll just use force font DPI for that.