https://bugs.kde.org/show_bug.cgi?id=462316
--- Comment #5 from gggeri91 <geloczig...@gmail.com> --- Update: more tests with AMD RX 580 GPU I put back my RX 580 into my system and ran more tests, because that card has a DVI output as well. I restarted my PC before each test to make sure it is a clean starting state. Please see the results below. Operating System: Kubuntu 22.04 KDE Plasma Version: 5.24.7 KDE Frameworks Version: 5.92.0 Qt Version: 5.15.3 Kernel Version: 5.15.0-56-generic (64-bit) Graphics Platform: X11 Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor Memory: 31,3 GiB of RAM Graphics Processor: AMD Radeon RX 580 Series --- #1 Test with DVI-D-0 + DisplayPort-1 Result: OK. #2 Test with DisplayPort-0 + DisplayPort-1 Result: FAILED. --- Conclusions: - The issue is related to the video output type (DisplayPort) - It is not related to a specific GPU model My thoughts on DisplayPort: DisplayPort has more capabilities than DVI/HDMI regarding power states. - If you turn off a monitor connected to DVI/HDMI the OS won't know about it, so the desktop layout also won't change. - If you turn off a DisplayPort monitor, the desktop layout changes accordingly. So what happens when both monitors in a dual monitor setup are connected via DisplayPort? The moment they enter standby I guess both of them are "lost" to the OS which causes issues like this. This is just my theory, trying to find logic in this, please correct me if I'm wrong :) -- You are receiving this mail because: You are watching all bug changes.
