Bug 445236 - All Qt5 applications have their font sizes way bigger than they are supposed to be in an X11 session in Plasma 5.23.3-1. This affects all components and I am not sure what category to use.
Summary: All Qt5 applications have their font sizes way bigger than they are supposed ...
Status: RESOLVED UPSTREAM
Alias: None
Product: plasmashell
Classification: Plasma
Component: general (show other bugs)
Version: 5.23.3
Platform: Arch Linux Linux
: NOR major
Target Milestone: 1.0
Assignee: David Edmundson
URL: https://gitlab.freedesktop.org/xorg/x...
Keywords:
: 445252 445258 445269 445280 445305 445309 445314 (view as bug list)
Depends on:
Blocks:
 
Reported: 2021-11-09 23:03 UTC by anhollander516@gmail.com
Modified: 2021-11-11 15:24 UTC (History)
13 users (show)

See Also:
Latest Commit:
Version Fixed In:
anhollander516: X11+
anhollander516: Usability+

Attachments
The expected font size is used by Bleachbit, a GTK3 app. Qalculate! Qt5 and Dolphin do not use the correct font size. The only thing that does is the clock. (610.24 KB, image/png)
2021-11-09 23:03 UTC, anhollander516@gmail.com 		Details
attachment-2973-0.html (1.23 KB, text/html)
2021-11-11 07:51 UTC, sid.kakroo 		Details
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Description anhollander516@gmail.com 2021-11-09 23:03:04 UTC 
Created attachment 143384 [details]
The expected font size is used by Bleachbit, a GTK3 app. Qalculate! Qt5 and Dolphin do not use the correct font size. The only thing that does is the clock.

SUMMARY
After updating to Plasma 5.23.3-1 from the Arch Linux repos, in an X11 session, all Qt5 applications' fonts are way bigger than they are supposed to be. This also applies to all plasmashell components, as well as KWin window titles. Absolutely none of this is reproducible in a Plasma Wayland session.

STEPS TO REPRODUCE
1. Update KDE Plasma to 5.23.3-1 on Arch Linux
2. Reboot

OBSERVED RESULT
Observe SDDM's font sizes are way bigger than they were before updating. After logging in to an X11 session, all fonts in plasmashell, the KDE apps, and other Qt5 apps are way bigger than they were before updating. All GTK apps, as well as the clock widget, look totally fine.

EXPECTED RESULT
No changes after updating except for the intended minor tweaks and bug fixes.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 5.23.3-1
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.2
Kernel Version: 5.14.16-arch1-1
Graphics Platform: X11

ADDITIONAL INFORMATION
I have reproduced this bug on two separate machines. Neither are using NVIDIA GPUs. The second one is running a completely stock KDE, except for changing the theme to Breeze Dark and upping the font sizes by 1pt.
Comment 1 Nicolas Fella 2021-11-09 23:18:23 UTC 
This is caused by a change in X11, see https://gitlab.freedesktop.org/xorg/xserver/-/issues/1241#note_1149546
Comment 2 Nicolas Fella 2021-11-09 23:20:52 UTC 
A workaround is to set "Force font DPI" to 96 in the font settings
Comment 3 Antonio Rojas 2021-11-10 07:57:48 UTC 
*** Bug 445252 has been marked as a duplicate of this bug. ***
Comment 4 Nishith Khanna 2021-11-10 08:06:09 UTC 
Yeah the workaround by Nicolas fixes issue for me. Sorry I didn't know my bug report was a duplicate one.
Comment 5 Antonio Rojas 2021-11-10 08:59:07 UTC 
*** Bug 445258 has been marked as a duplicate of this bug. ***
Comment 6 Nicolas Fella 2021-11-10 11:57:10 UTC 
*** Bug 445269 has been marked as a duplicate of this bug. ***
Comment 7 anhollander516@gmail.com 2021-11-10 13:39:34 UTC 
(In reply to Nicolas Fella from comment #2)
> A workaround is to set "Force font DPI" to 96 in the font settings

This worked, thanks!
Comment 8 Antonio Rojas 2021-11-10 15:10:32 UTC 
*** Bug 445280 has been marked as a duplicate of this bug. ***
Comment 9 Nicolas Fella 2021-11-11 01:48:04 UTC 
*** Bug 445305 has been marked as a duplicate of this bug. ***
Comment 10 Antonio Rojas 2021-11-11 07:32:49 UTC 
*** Bug 445309 has been marked as a duplicate of this bug. ***
Comment 11 sid.kakroo 2021-11-11 07:51:56 UTC 
Created attachment 143442 [details]
attachment-2973-0.html

Thanks for the quick respose
How do i fix?
Comment 12 Paul Worrall 2021-11-11 10:05:03 UTC 
*** Bug 445314 has been marked as a duplicate of this bug. ***
Comment 13 aa1874 2021-11-11 15:24:01 UTC 
I hope the devs added a real fix so that we don't need to use Nicolas' workaround