https://bugs.kde.org/show_bug.cgi?id=441904
--- Comment #11 from angn...@gmail.com --- I reproduce the bug with a non-maximized but full-sized window, on the primary and secondary monitors, with and without toolbars. To reproduce on my 2560x1440 monitors (Nvidia driver): 1- resize the firefox window+decorations to the monitor resolution (2560x1440 in my case, adjust to yours). The window can be anywhere, only the size is important. 2- press F11 Expected: Full Screen window Actual: Black screen Also tested and reproduced with VLC, same procedure. KDE Info: Operating System: Arch Linux KDE Plasma Version: 5.22.5 KDE Frameworks Version: 5.85.0 Qt Version: 5.15.2 Kernel Version: 5.13.13-arch1-1 (64-bit) Graphics Platform: X11 Processors: 12 × AMD Ryzen 5 3600 6-Core Processor Memory: 31.3 GiB of RAM Graphics Processor: NVIDIA GeForce GTX 1660 SUPER/PCIe/SSE2 -- You are receiving this mail because: You are watching all bug changes.