Bug 464844 - Windows become blurry when moved from one screen to another via a shortcut
Summary: Windows become blurry when moved from one screen to another via a shortcut
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: multi-screen (show other bugs)
Version: 5.26.5
Platform: Fedora RPMs Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-01-26 08:29 UTC by Marco
Modified: 2023-02-20 11:14 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:

Attachments
Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Marco 2023-01-26 08:29:24 UTC 
SUMMARY
I am using Plasma on X11.

When opening a window on the laptop screen (15 inches, 1920x1200), and then moving it with a shortcut to the external monitor (24 inches, 1920x1080), the window text and elements become blurry. This only happens when the window is moved instantly via a shortcut. If instead I drag the window from the laptop screen to the external monitor, everything is fine.


STEPS TO REPRODUCE
1. Open a window on the laptop screen (I guess, any screen with a higher pixel density than the other screen would work)
2. Move the window to the lower-density screen with a shortcut.

OBSERVED RESULT
The window is now blurry on the other screen

EXPECTED RESULT
The window should adapt to the new pixel-density, and look normal

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 37
(available in About System)
KDE Plasma Version:  5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Comment 1 Nate Graham 2023-01-27 17:30:31 UTC 
Are you using any screen scaling?

Does it work properly on Wayland?
Comment 2 Marco 2023-01-28 11:17:45 UTC 
I am not using any screen scaling. I do not know whether Wayland ahs this issue. I will check. But definitely, it is an issue in X11.
Comment 3 Marco 2023-01-28 11:22:06 UTC 
I can confirm that on Wayland I have the same issue.
Comment 4 Vlad Zahorodnii 2023-02-02 18:47:47 UTC 
https://invent.kde.org/plasma/kwin/-/commit/e8d5f1e62de979f35c37cf5cd05dc049555a0673 may improve things, there were also other fixes in 5.27. It would be nice to know if 5.27 fixes it
Comment 5 Bug Janitor Service 2023-02-17 03:48:09 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 6 Marco 2023-02-18 09:11:09 UTC 
I cannot reproduce the bug anymore on Plasma 5.27. It seems to have been fixed.