Created attachment 105844 [details] Screen record of the problem I use my notebook either with its own screen, or with two external screens with the own display switched off. When I connect the two external monitors, the system changes to the correct setup (side by side screens), but one of the screens do not refresh, the windows are shown as they were on the notebook screen (both the notebook screen and the bad screen are FHD), but the screen is practically frozen. However not fully, since the mouse pointer is visible and moves, and it can also interact with screen elements and windows, but the screen is not refreshed at all. I can even grab a window and move it to the other screen, which results in a strange layout of having the live window on the good screen, while having the original window on the bad screen. I have tried to make a screen record with SimpleScreenRecorder. The recording is also strange, because it shows that the screen is somehow refreshed, but sometimes it flickers back to the frozen state. This strange behavior can be solved by either switching to a terminal screen and back, or by disabling the bad screen and re-enabling it. When everything is ok, the screen recording is fine, no flickers (thus it is not a software effect), so I attach the recording to illustrate the problem. This whole problem started a few weeks ago, but do not know exactly which KDE version is the starting point.
Maybe it is also related, that even after getting beck to work the bad screen, the Task managers only current screen filter does not work on this screen. It works perfectly on the other screen.
Thanks for the report Gábor. I've just tried to reproduce this on Plasma from git master but cannot. Can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved, thanks.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!