SUMMARY When powerdevil-6.0 is built with screen brightness support (HAVE_DDCUTIL), the screen brightness decreases as per power management settings, but is not restored upon unlocking the session. The brightness level slider in the applet is not updated as well. Changing the value there brings the desired brightness level back. STEPS TO REPRODUCE 1. Wait until the screen gets locked and powered off 2. Wake up the screen. Notice normal brightness level in the screenlock. 3. Unlock the session. OBSERVED RESULT Screen goes dim. EXPECTED RESULT Screen brightness corresponds to the value as it is set in the brightness applet. SOFTWARE/OS VERSIONS Operating System: Gentoo Linux 2.14 KDE Plasma Version: 6.0.0 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 Kernel Version: 6.7.7-gentoo (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 9 5900HX with Radeon Graphics Graphics Processor: AMD Radeon Graphics
Hi admin, The same problem exists in the KDE Neon Wayland version as well. Regards, Sharathchandra
Hi, could you confirm if this is still an issue with Plasma 6.0.1 or higher? The original 6.0.0 release was missing this commit: https://invent.kde.org/plasma/powerdevil/-/commit/8681355217eb6ff121785572eaf4ef2ca21b464b which fixed restoring the old brightness in some cases (see the link for more details in the commit message).
(In reply to Jakob Petsovits from comment #2) > Hi, could you confirm if this is still an issue with Plasma 6.0.1 or higher? > The original 6.0.0 release was missing this commit: > https://invent.kde.org/plasma/powerdevil/-/commit/ > 8681355217eb6ff121785572eaf4ef2ca21b464b which fixed restoring the old > brightness in some cases (see the link for more details in the commit > message). This is still an issue for me in 6.0.3. Same repro steps as above. My screens (2x DisplayPort, 1x HDMI) are set to 100% brightness; after the screens are turned off due to inactivity, they will be at some brightness <100% after being turned back on.
Still an issue here with 6.0.3 and a single HDMI screen as well, albeit it happens less often with 6.0.3 as compared to 6.0.1. The screen is set to 50% brightness, and finds itself dimmed to the min (10%) after waking up from sleep.
In case it's helpful: in my 2x DisplayPort, 1x HDMI setup, the issue seems to be occurring only on the monitor connected by HDMI - the other 2 monitors are correctly set at 100% brightness after resuming. The monitor connected by HDMI also takes longer to turn back on, so I wonder if it's a timing issue of some kind.
Sorry, ignore all the above - it just happened on the DisplayPort monitors, too.
im having this issue as well. mine brightness always gets set to 30% Operating System: Fedora Linux 40 KDE Plasma Version: 6.0.4 KDE Frameworks Version: 6.1.0 Qt Version: 6.7.0 Kernel Version: 6.8.7-300.fc40.x86_64 (64-bit) Graphics Platform: Wayland Processors: 8 × Intel® Xeon® CPU E5-1620 v3 @ 3.50GHz Memory: 62.7 GiB of RAM Graphics Processor: AMD Radeon RX 470 Graphics
*** Bug 486500 has been marked as a duplicate of this bug. ***
See Bug 486500 Comment #2 for an informed guess at what's happening. Brief summary, I agree with David Warner above that this is likely timing-related and perhaps caused by a lack of coordination with the DPMS (screen turn-off/on) action.
Actually no, let me un-duplicate Bug 486500 again because this bug is about brightness being dimmed after *unlocking*, whereas Bug 486500 is about brightness being dimmed immediately after wake-up (i.e. brightness would be wrong even on the lock screen).