SUMMARY Screen brightness increases (15% -> 64%) after Plasma Wayland login. STEPS TO REPRODUCE 1. Use Plasma X11 session. Set screen brightness (e.g. 15%) using physical buttons on the monitor. 2. Logout. 3. Change to Plasma Wayland in sddm UI. 4. Login. OBSERVED RESULT Brightness goes up, to something around 64%. There's no confirmation dialog or notification about brightness change. EXPECTED RESULT Brightness shouldn't change without my consent. SOFTWARE/OS VERSIONS Operating System: Fedora Linux 41 KDE Plasma Version: 6.3.4 KDE Frameworks Version: 6.13.0 Qt Version: 6.8.2 Kernel Version: 6.13.11-200.fc41.x86_64 (64-bit) Graphics Platform: X11 Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz Memory: 15.4 ГиБ of RAM Graphics Processor 1: Intel® HD Graphics 530 Graphics Processor 2: NVIDIA GeForce GTX 960M ADDITIONAL INFORMATION
Does it also happen on Wayland?
> Does it also happen on Wayland? What do you mean "on Wayland"? Can you describe a scenario you think deserves testing? Note that "STEPS TO REPRODUCE" involve both X11 and Wayland.
Sorry, I was reading too fast.
I'm not able to reproduce this on git-master with a laptop and external monitor After following the steps to reproduce, the external monitor retained the same brightness level Are you still able to reproduce this with Plasma 6.4.5 or later and ddcutil 2.2.1 or later? Note: The login screen when logging out and back in is the lock screen, not SDDM (which is used for first login after the system starts)
🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME. For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging. Thank you for helping us make KDE software even better for everyone!
🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.
Still reproducible on Plasma Wayland logout/login cycle: 1. Use Plasma Wayland session. Set screen brightness to 50% using physical buttons on the monitor. 2. Logout. 3. Login into a Plasma Wayland session again. 4. Using physical buttons on the monitor to see brightness, it's set to 63%.
Re: comment #7 relevant kinfo: Operating System: Fedora Linux 42 KDE Plasma Version: 6.4.5 KDE Frameworks Version: 6.19.0 Qt Version: 6.9.2 Kernel Version: 6.17.4-200.fc42.x86_64 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz Memory: 16 ГиБ of RAM (15.4 ГиБ usable) Graphics Processor 1: Intel® HD Graphics 530 Graphics Processor 2: NVIDIA GeForce GTX 960M
``` $ ddcutil --version ddcutil 2.2.1 ... ```