I have some good news. We have found a temporary fix for this issue. By using the
-nohighdpi
argument when launching the editor, we were able to disable the high DPI support and resolve the scaling problem. It is worth noting that the “Enable High DPI Support” checkbox under ‘Editor Preferences > General > Appearance’ seems to be enabled by default and cannot be disabled from within the editor (still active after restarting the editor). This behavior is unexpected and may be contributing to the scaling issue.
While this temporary workaround has helped us, we still hope for an official solution from the Unreal Engine team to address this scaling issue in Linux with UE Editor 5.2. We greatly appreciate their efforts to resolve this problem as quickly as possible to restore a seamless experience for Linux users.