SUMMARY My computer is set to turn the monitor off after a certain period of time, but it turns right back on again. STEPS TO REPRODUCE 1. Enable monitor automatically shutting off in power management settings 2. Lock screen 3. Wait for monitor to turn off (or press escape to make it happen immediately) OBSERVED RESULT Monitor turns off then immediately turns back on again EXPECTED RESULT Monitor stays turned off SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 6.6.0 KDE Frameworks Version: 6.23.0 Qt Version: 6.10.2 Kernel Version: 6.18.9-arch1-2 (64-bit) Graphics Platform: Wayland Processors: 16 × AMD Ryzen 7 7800X3D 8-Core Processor Memory: 64 GiB of RAM (62.0 GiB usable) Graphics Processor: AMD Radeon RX 7900 XTX ADDITIONAL INFORMATION This bug happened before and was fixed, and now it is back. The monitor is hooked up through HDMI. A second computer with a monitor that is hooked up through DVI stays turned off.
The monitor also turns back on immediately after shutting off when running "kscreen-doctor --dpms off".
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/8875
Git commit cae4fd8758975f6cd585c9e6d911ec6fd828ce46 by Xaver Hugl. Committed on 24/02/2026 at 11:11. Pushed by zamundaaa into branch 'master'. workspace: prevent the placeholder output from changing dpms mode And add a test for it, so it doesn't regress again. M +35 -0 autotests/integration/outputchanges_test.cpp M +2 -0 src/backends/virtual/virtual_output.cpp M +2 -2 src/workspace.cpp https://invent.kde.org/plasma/kwin/-/commit/cae4fd8758975f6cd585c9e6d911ec6fd828ce46
*** Bug 516704 has been marked as a duplicate of this bug. ***
Git commit 5467e5456716c0b62bd0ec8184f39596943fdfd0 by Vlad Zahorodnii, on behalf of Xaver Hugl. Committed on 26/02/2026 at 14:11. Pushed by vladz into branch 'Plasma/6.6'. workspace: prevent the placeholder output from changing dpms mode And add a test for it, so it doesn't regress again. (cherry picked from commit cae4fd8758975f6cd585c9e6d911ec6fd828ce46) Co-authored-by: Xaver Hugl <xaver.hugl@kde.org> M +35 -0 autotests/integration/outputchanges_test.cpp M +2 -0 src/backends/virtual/virtual_output.cpp M +2 -2 src/workspace.cpp https://invent.kde.org/plasma/kwin/-/commit/5467e5456716c0b62bd0ec8184f39596943fdfd0