Since updating to KDE 5.27 (Friday 2/17/2023 I believe) my laptop screen doesn’t dim nor turn off when inactive. Same behavior if on mains or battery power. I’ve tried shutting down and restarting, and changing the timeout values in system settings, all with no effect.
Known issue? (Search didn’t return anything similar.)
I’ve yet to try it on my desktop although I fear it may be the same - I remember being mildly alerted when I’d last been away and the screen was still on*. Will check.
Machine: Dell XPS 9520
CPU: i7-12700H
Memory: 32GB
GPU: Intel Iris Xe iGPU & RX 3050Ti (but the system won’t use it)
Screen: 4K panel
Machine recognizes when power is unplugged.
I should boot into Windows 11 (it’s always useful to keep it around for sanity checks!) and ensure it’s not a hardware problem, if I can find the BitLocker recovery key…
Addendum 1: Booted into Windows 11. It behaves as expected (including about 4 reboots for updating system bits - almost as bad as Fedora! (I kid!))
Addendum 2: Just tried this on a desktop machine (new AMD 7950X build) running Fedora 37. Luckily I hadn’t yet updated to KDE 5.27 so I could observe that the screen turned off after the 1 minute interval I set on KDE 5.26.5 and did not turn off after the same interval once I’d updated to and booted into the same system now running KDE 5.27.
Ladies and gentlemen, we got 'm! I would call that a reproducible scenario.
*Might not actually have been the same machine running the same system: I have many machines, all multi-boot, and I’ve been testing different configurations of (graphics) hardware and software recently. Also, I might not have been away long enough.