Bug 25452

Summary: Font rendering issue on high-dpi screen
Product: Mageia Reporter: Guillaume Rousse <guillomovitch>
Component: RPM PackagesAssignee: Thomas Backlund <tmb>
Status: NEW --- QA Contact:
Severity: normal    
Priority: Normal CC: maurice77
Version: Cauldron   
Target Milestone: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Source RPM: gtk+3.0 CVE:
Status comment:

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