On Wayland, when I'm playing a Youtube video in the Falkon web browser, if I don't move the mouse, the screen gets dim after a few minutes and then the lock screen appears. The video playing should prevent this behaviour like it does on X11.
Plasma 5.13.2, KDE Frameworks 5.47, Intel modesetting driver, Archlinux.
Can reproduce falkon-git-3.0.1 Plasma: 5.13.1 Apps: 18.04.2 Frameworks: 5.47.0 Qt: 5.11.1 Kernel: 4.18.0-1-MANJARO OS: Netrunner Rolling Video: Intel 4400 Driver: xf86-video-intel 1:2.99.917+831+ge7bfc906-1 Mesa 3D: 18.1.2 Screen: 1600x900 Xorg: 1.20 Wayland: 1.15.0-1 Wayland Protocols: 1.14-1
That's Wayland-specific and it is a QtWebEngine/Chromium bug.
*** This bug has been marked as a duplicate of bug 389356 ***