Bug 25452 - Font rendering issue on high-dpi screen
Summary: Font rendering issue on high-dpi screen
Status: NEW
Alias: None
Product: Mageia
Classification: Unclassified
Component: RPM Packages (show other bugs)
Version: Cauldron
Hardware: All Linux
Priority: Normal normal
Target Milestone: ---
Assignee: Thomas Backlund
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Reported: 2019-09-18 05:19 CEST by Guillaume Rousse
Modified: 2020-10-05 15:23 CEST (History)
1 user (show)

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Source RPM: gtk+3.0
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Description Guillaume Rousse 2019-09-18 05:19:00 CEST 
Since 15 days approximatively, matching latest gtk+ package update to versiob 3.24.11, font rendering on non-gnome GTK+ applications, such as thunderbird or firefox, has made them unreadable on high-dpi screens, such as  3200x1800 laptop display. I had to set GDK_SCALE=2 environment variable in order to restore previous behavior.
Comment 1 Lewis Smith 2019-09-18 22:11:17 CEST 
@Guillaume : thank you for reporting this ; and your remedy.

Assigning to tmb for gtk+3.0

Assignee: bugsquad => tmb

Comment 2 Guillaume Rousse 2019-10-16 20:13:55 CEST 
There is a scale setting, in gnome command panel, which fixes the issue once set to 200%. It seems just an upgrade issue between different GTK+ versions.
Comment 3 Maurice Batey 2020-10-05 15:23:40 CEST 
(In reply to Guillaume Rousse from comment #0):

> I had to set GDK_SCALE=2 environment variable
> in order to restore previous behavior.

I'm having  problem with latest Thunderbird (78.3.1), such that in email Composer the text (and any quoted text) is shown in a tiny font, which can be enlarged by repeated use of Ctl+.

How does one set GDK_SCALE=2 so that it gets permanently automatically set for Tbird?

If GDK_SCALE=2 is insufficient, is it just a question of e.g. GDK_SCALE=3 instead?

CC: (none) => maurice
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