https://bugs.kde.org/show_bug.cgi?id=426609

c...@ccss.de changed:

           What    |Removed                     |Added
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                 CC|                            |c...@ccss.de

--- Comment #2 from c...@ccss.de ---
Same here, too. Even when the display is switched off using `xset dpms force
off` it switches back on after a few seconds. After long searching I found this
thread:
https://www.linuxquestions.org/questions/linux-hardware-18/monitor-doesn%27t-stay-in-standby-when-using-a-dp-cable-4175672795/
with the suggestion to disable kscreen2 - et voilà, when kscreen2 is disabled
it works, the screens remain off.

Operating System: Kubuntu 21.04 (but the problem was already present in 20.10)
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2
Kernel Version: 5.11.0-16-generic
OS Type: 64-bit
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: Radeon RX 5500 XT

Two 2k-Monitors connected, one with DP and the other with HDMI

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