Bug 423733 - Global scaling leads to rendering problems
Summary: Global scaling leads to rendering problems
Status: RESOLVED DUPLICATE of bug 373232
Alias: None
Product: konsole
Classification: Applications
Component: general (show other bugs)
Version: unspecified
Platform: Manjaro Linux
: NOR major
Target Milestone: ---
Assignee: Konsole Developer
Depends on:
Reported: 2020-07-01 10:01 UTC by Hans
Modified: 2020-07-01 12:43 UTC (History)
0 users

See Also:
Latest Commit:
Version Fixed In:

Rendering artifacts in console (simplest to reproduce) (128.04 KB, image/png)
2020-07-01 10:01 UTC, Hans

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Description Hans 2020-07-01 10:01:23 UTC
Created attachment 129813 [details]
Rendering artifacts in console (simplest to reproduce)


When using the global scale dail in the settings, and setting it to anything other than 100%, some applications start to flicker and on other parts of the screeen I get rendering artifacts. In the attached screenshot you can see these artifacts in the console.

This problem makes it unusable, and to work on 100% scaling on a 4K screen isn't really fun either.

1. (Probably optional, I can't test it) Use high DPI monitor, in my case 2K or 4K
2. Set global scale in settings to a value above 100%
3. If everything seems to work proberly, open a console and paste some lines (see screenshot)


Flickering applications due to a general rendering problem, regardless of the video driver and tearing in some places


Prober rendering

Linux/KDE Plasma: 5.7.6-1-MANJARO 
KDE Plasma Version: 5.19.2
KDE Frameworks Version: 5.71.0
Qt Version: 5.15.0


Using GTX 970 as GPU, tried video drivers video-nvidia-440xx, video-linux, video-modesetting.
Comment 1 Vlad Zahorodnii 2020-07-01 12:11:24 UTC
Are you using fractional scaling?
Comment 2 Hans 2020-07-01 12:17:54 UTC
(In reply to Vlad Zahorodnii from comment #1)
> Are you using fractional scaling?

I am not quite sure what fractional scaling is.
I set the global scale (and only the global scale not some font size settings etc.) in the plasma settings-menu to 125% or 150%.
Comment 3 Vlad Zahorodnii 2020-07-01 12:42:59 UTC
(In reply to Hans from comment #2)
> I am not quite sure what fractional scaling is.

Scale factors that are not multiple of 100 are known as "fractional scale factors," e.g. 125%.

*** This bug has been marked as a duplicate of bug 373232 ***