https://bugs.kde.org/show_bug.cgi?id=419421
--- Comment #19 from Yaroslav <yaroslav4...@gmail.com> --- I set mode in system configuration. And modify two files: in /.config/kwinrc in section [Compositing] i add parameter MaxFPS=240 in /etc/environment i added to the end of the file: LUTTER_DEFAULT_FPS=240 __GL_SYNC_DISPLAY_DEVICE=DP-2 without this modifications testufo.com displayed 60 Hz and the monitor continued to work in 60 Hz mode. If i removed my modifications desktop-elements you also need to click very quickly. I have a GPU: GTX 1060 3GB Driver: nvidia-driver-450 (proprietary) -- You are receiving this mail because: You are watching all bug changes.