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FS#43947 - [plasma-workspace] DPI seems hardcoded to 96x96

Attached to Project: Arch Linux
Opened by Kiril Vladimiroff (Vladimiroff) - Wednesday, 25 February 2015, 12:50 GMT
Last edited by Antonio Rojas (arojas) - Sunday, 20 September 2015, 06:01 GMT
Task Type Bug Report
Category Packages: Extra
Status Closed
Assigned To Antonio Rojas (arojas)
Felix Yan (felixonmars)
Architecture x86_64
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No


I have a MacBook Pro 11,3 (13-inch) with Retina display. KDE/Qt/GTK+ applications look as good as possible, but plasma and related applications (like desktop effects configuration screen) show fonts and icons pixelated.


Acording to xdpyinfo DPI is set correctly (and all apps respect that):

screen #0:
dimensions: 2560x1600 pixels (286x179 millimeters)
resolution: 227x227 dots per inch

Additional info:
* Qt 5.4.0
* KDE Frameworks 5.7.0
* Plasma 5.2.0
* Kernel 3.18.6
* I'm with Intel i5 (Haswell) with built-in video card

* Created brand-new user in order to make sure it's not a configuration issue

Steps to reproduce:
1. Install plasma 5.2 on a machine with HiDPI screen (MacBook Pro, X1 Carbon 3rd gen, ...)
2. Set the fonts DPI from System Settings -> Fonts -> Force fonts DPI to 124 or 144
3. Configure the screen DPI in X (
4. Confirm it's set properly after restart (e.g. xdpyinfo | grep -B 2 resolution)
5. Confirm that all applications take these settings into account and look normal
6. Take a look at a plasma panel, widget, etc...

At first I thought it's an upstream issue, but I can't reproduce this on Kubuntu Live CD (same KDE and plasma versions).
This task depends upon

Closed by  Antonio Rojas (arojas)
Sunday, 20 September 2015, 06:01 GMT
Reason for closing:  Fixed
Comment by Ma Jiehong (jiehong) - Thursday, 30 April 2015, 13:14 GMT
With plasma 5.2, setting the dpi at 192 works fine for me without setting the DPI in X.

I don't have the pixelated issue you have on my 2880×1800 screen.
Comment by Antonio Rojas (arojas) - Saturday, 19 September 2015, 22:50 GMT
There have been lots of DPI fixes in recent Plasma versions, is this still an issue?
Comment by Kiril Vladimiroff (Vladimiroff) - Saturday, 19 September 2015, 23:51 GMT
Well, DPI reported by the X server is still 96x96, but this is a WONTFIX for them due to... questionable reasons. Plasma however handles high DPI flawlessly for quite some time, so this can be considered as resolved now.