bugGNU TeXmacs - Bugs: bug #60408, 4k screen on Linux with 125%...


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bug #60408: 4k screen on Linux with 125% scaling of UI elements produces blurry fonts

Submitter:  Ingolf Schäfer <ovidius>
Submitted:  Sat 17 Apr 2021 05:10:15 PM UTC
Category:  Qt port Priority:  7 - High
Item Group:  Error Status:  In Progress
Privacy:  Public Assigned to:  vdhoeven
Originator Name:  Open/Closed:  Open
Release:  None Release:  1.9.14
Fixed Release:  None Fixed Release: 

Fri 25 Jun 2021 09:15:58 PM UTC, comment #4: 

I have tried the latest Ubuntu Budgie today and there the problem does not exist even in X11.

Ingolf Schäfer <ovidius>
Tue 22 Jun 2021 08:08:16 AM UTC, comment #3: 

AFAIK this happens on X11 only and scaling works correctly on Wayland. Some distros switched to Wayland by default, but most still run on X11.

Ingolf Schäfer <ovidius>
Sun 20 Jun 2021 08:53:34 PM UTC, comment #2: 

I understand from the form that setting


when launching TeXmacs temporarily solves the problem.

I agree that this is a very annoying issue and that we should find a better solution.

Are there some GNU Linux distributions for which TeXmacs does work with QT_SCREEN_SCALE_FACTORS different from 1?
If not, then we might always use the above setting.

Joris van der Hoeven <vdhoeven>
Group administrator
Sat 17 Apr 2021 05:17:11 PM UTC, comment #1: 

I have checked that this goes back as far as 1.9.14 but is still in the current version and happens with Qt 5.15.2

Ingolf Schäfer <ovidius>
Sat 17 Apr 2021 05:10:15 PM UTC, original submission:  

Im using TeXmacs under Manjaro Linux with KDE on a 4k monitor and 125% upscaling and it produces blurry fonts.

Manually scaling back to 100% with QT_SCREEN_SCALE_FACTORS from command line produces sharp fonts, but every other factor 150%, 200% gets blurry fonts.

Screenshots with examples from openSUSE and Fedora and a partial discussion of the problem can be found in the TeXmacs forum over http://forum.texmacs.cn/t/struggling-with-texmacs-on-4k-screen-under-linux/320/6

Ingolf Schäfer <ovidius>


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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2021-06-20 vdhoeven CategoryTypesetter Qt port
        Priority5 - Normal 7 - High
        StatusNone In Progress
        Assigned toNone vdhoeven
    2021-04-17 ovidius Carbon-Copy- Added ovidius

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