Created attachment 120148 [details] screenshot Hi in hi-dpi 4k scaling every things is small scaling setting on 200% Linux : Ubuntu 18.04
How did you set 200% scaling? By using System Settings > Display & Monitor > Scale Display (correct) or System Settings > Fonts > Force Fonts DPI (incorrect)?
(In reply to Nate Graham from comment #1) > How did you set 200% scaling? By using System Settings > Display & Monitor > > Scale Display (correct) or System Settings > Fonts > Force Fonts DPI > (incorrect)? System Settings > Display & Monitor > Scale Display
Thanks, that's the correct method. Cannot reproduce with Kolourpaint 19.04.0. The version you're using (17.12.3 ) is quite old at this point.
Yep, fixed since 18.08 version.
How update to 17 or 18? I have Ubuntu 18.04 last version its 16
Update to a newer Ubuntu version or use a newer Snap- or Flatpak-provided version of Kolourpaint. If you need any further details, please ask in an Ubuntu-specific venue, as Ubuntu's release schedule and packaging decisions is something that KDE has no impact on. Thanks!
i install version 19.04 from snap but not fix scaling and every things is small
How did you configure scaling in systemsettings? Via font size, or via font DPI or via kscreen scaling factor?
Could you please test this in Konsole: QT_SCALE_FACTOR=2 kolourpaint If this changes scaling, it means you didn't setup scaling correctly.
(In reply to Christoph Feck from comment #8) > How did you configure scaling in systemsettings? Via font size, or via font > DPI or via kscreen scaling factor? This is my setting http://uupload.ir/files/6hyp_screenshot_from_2019-06-26_09-25-04.png http://uupload.ir/files/468_screenshot_from_2019-06-26_09-25-19.png
(In reply to Christoph Feck from comment #9) > Could you please test this in Konsole: > > QT_SCALE_FACTOR=2 kolourpaint > > If this changes scaling, it means you didn't setup scaling correctly. This is fix scaling for kolourpaint
It looks like the problem here is that GNOME doesn't set the appropriate environment variables to make Qt apps get scaled along with GTK apps. Please file a bug against GNOME Control Center telling them to set QT_SCALE_FACTOR when the user chooses a high DPI scale factor so that Qt apps get scaled as well. (BTW, GTK apps run in Plasma do get correctly scaled. :) )