SUMMARY *** After the set time, the screen remain still on (with screensaver working or not) *** STEPS TO REPRODUCE 1. Set Screen Energy Saving -> switch off after 4 min. 2. Expect 5 min. 3. The screen is always on OBSERVED RESULT The screen is always on EXPECTED RESULT The screen should off after 4 min SOFTWARE/OS VERSIONS Operating System: KDE neon 5.27 KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.114.0 Qt Version: 5.15.12 Kernel Version: 6.5.0-18-generic (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 5700G with Radeon Graphics Memory: 13,5 GiB of RAM Graphics Processor: AMD Radeon Graphics ADDITIONAL INFORMATION
I noticed that 1) The screen goes off at the expected time, but after a few seconds it is back with an unending screensaver loop 2) This morning I tried using not an hdmi cable, but with a vga one, and all seems correct. So, the problem seems be HDMI cable.
Indeed I found searching with Google many cases of HDMI bad behavior of screen energy saving (in my case even with x11, not trying wayland). I think that it is a bug that developers should solve. Or there is already some fix?
Would this bug be filed more correctly for Powerdevil (5.27) perhaps? That's what handles dimming and turning off displays after a pre-defined idle time. Or is it specific to KDE neon, the distribution? Also, would you please be so kind and check if this is also an issue if you boot the latest KDE neon version?