Fullscreen scaling issue on KDE Plasma on latest flatpak version

Is there an existing issue for this?

• This is a bug in RetroArch frontend
• I have searched the existing issues

Description

Hi,

Since the latest Flatpak version of Retroarch, 1.22.2 there seems to be an issue with the frontend when using Scaling from the KDE Plasma Display Configuration page.
I use a 4K TV as a living room solution which is unusable without scaling to 175%.

I don't see a difference within RetroArch SystemInformation in RetroArch Version or Git Version, but an earlier Flatpak commit (42b75b25a2ae01f3c03da1277f67aa37d5464cc83d41d91361fcc546f29b32d6) does not have this issue while the default installed latest version does.

Expected behavior

When using Retroarch in Fullscren Display=ON mode, it should show the entire screen.

What shows now is that it "zooms" in on the application cutting off parts of the screen.

Steps to reproduce the bug

• Setup display scaling in KDE Plasma (I am running Fedora 43) to anything above 100%
• Set RetroArch to use fullscreen mode
• Restart

Before update (commit 42b75b25a2ae01f3c03da1277f67aa37d5464cc83d41d91361fcc546f29b32d6)

After update (Latest flatpak commit)

Version/Commit

1.22.2 (69a4f0ea1e)

Bisect Results

No response

Present in the nightly version

I don't know

Platform & operating system

Linux Fedore 43 KDE kernel 6.18.9

Affected Cores

No response

Environment information

No response

Relevant log output

Start by reproducing the issue with RetroArch 1.22.2 on Fedora 43 KDE Plasma using display scaling above 100% and fullscreen mode. Compare the latest Flatpak commit with 42b75b25a2ae01f3c03da1277f67aa37d5464cc83d41d91361fcc546f29b32d6; done means fullscreen displays the entire screen without zooming or cropping.