516454 2026-02-21 10:49:32 +0000 HDMI monitor wakes from sleep immediately on the lock screen 2026-03-30 18:03:58 +0000 1 1 4 Plasma plasmashell Power management & brightness 6.6.0 Arch Linux Linux RESOLVED FIXED https://bugs.kde.org/show_bug.cgi?id=518271 NOR normal 1.0 1 graeme plasma-bugs-null jpetso nate skywing.io xaver.hugl https://invent.kde.org/plasma/kwin/-/commit/5467e5456716c0b62bd0ec8184f39596943fdfd0 6.6.2 0 oldest_to_newest 2496999 0 graeme 2026-02-21 10:49:32 +0000 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. 2497779 1 graeme 2026-02-23 21:24:35 +0000 The monitor also turns back on immediately after shutting off when running "kscreen-doctor --dpms off". 2497787 2 bug-janitor 2026-02-23 21:55:44 +0000 A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/8875 2497983 3 xaver.hugl 2026-02-24 15:44:30 +0000 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 2498688 4 xaver.hugl 2026-02-26 19:01:03 +0000 *** Bug 516704 has been marked as a duplicate of this bug. *** 2498691 5 vlad.zahorodnii 2026-02-26 19:21:17 +0000 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