https://bugs.kde.org/show_bug.cgi?id=527226
[email protected] changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REPORTED |RESOLVED Resolution|--- |FIXED --- Comment #1 from [email protected] --- Additional findings: Possible display configuration migration issue in Plasma 6.8.0 After further investigation, I have found a working solution and gathered additional information that may help identify the actual cause of this regression. IMPORTANT CLARIFICATION My original monitor configuration was created using KDE Plasma's graphical Display Configuration tool in System Settings. I did not manually configure overlapping monitor coordinates through the command line. Before upgrading to Plasma 6.8.0, my primary monitor was mirrored to my Samsung TV, allowing me to play games on the TV without moving application windows or changing the output monitor in individual games. This configuration worked correctly under Plasma 6.7.5. It is therefore possible that Plasma 6.8.0 incorrectly migrated or restored my existing display configuration during the upgrade. However, I cannot confirm this yet, since I did not record the replication source values before upgrading. INITIAL STATE AFTER UPGRADING TO PLASMA 6.8.0 HDMI-A-1 (Primary monitor): Resolution: 1920x1080 Refresh rate: 200 Hz Position: 0,0 Replication source: 0 DP-2 (Secondary monitor): Resolution: 1920x1080 Refresh rate: 100 Hz Position: 1920,0 Replication source: 0 DP-1 (Samsung TV): Resolution: 1920x1080 Refresh rate: 60 Hz Position: 0,0 Replication source: 0 Both HDMI-A-1 and DP-1 were positioned at 0,0, but neither output was configured as a replication source for the other. In this state, all existing desktop icons disappeared from the primary monitor. FIRST SUCCESSFUL TEST I disabled the Samsung TV using: kscreen-doctor output.DP-1.disable Immediately after executing this command, all missing desktop icons reappeared on the primary monitor. No Plasma restart, logout, or configuration reset was necessary. SECOND SUCCESSFUL TEST I re-enabled the Samsung TV, positioning it as an independent display to the right of the other monitors: kscreen-doctor output.DP-1.enable output.DP-1.position.3840,0 The desktop icons remained visible on both regular monitors. This suggests that the presence of a third monitor itself is not responsible for the problem. THIRD SUCCESSFUL TEST: CORRECT DISPLAY MIRRORING I then configured the Samsung TV to mirror my primary monitor using: kscreen-doctor output.DP-1.mirror.HDMI-A-1 After executing this command, KScreen reported: DP-1: Replication source: 3 Geometry: 3840,0 1920x1080 HDMI-A-1: Replication source: 0 Geometry: 0,0 1920x1080 The replication source value of 3 correctly referred to HDMI-A-1. The TV immediately displayed the same image as my primary monitor, and all desktop icons remained visible. REBOOT TEST I restarted the computer to verify whether the new configuration would be preserved. After rebooting: 1. All desktop icons remained visible. 2. The Samsung TV continued mirroring the primary monitor correctly. 3. KScreen still reported replication source 3 for DP-1. 4. Plasma 6.8.0 continued working without requiring a downgrade. The workaround therefore survives a complete system restart. POSSIBLE ROOT CAUSE Based on these findings, I suspect that Plasma 6.8.0 may have incorrectly restored or migrated an existing display mirroring configuration created through KDE System Settings. It appears that two outputs were active at the same logical coordinates without a proper replication relationship. This configuration may cause Plasma's Folder View to assign or display desktop icons incorrectly. The issue disappears immediately when the overlapping output is disabled, and it remains resolved when proper display replication is configured. However, I cannot determine whether the incorrect configuration was introduced during the upgrade, whether it already existed under Plasma 6.7.5, or whether Plasma 6.8.0 simply handles this configuration differently. CONCLUSION The issue is now resolved on my system without downgrading Plasma. The confirmed workaround is: 1. Disable the affected TV output. 2. Re-enable it at a non-overlapping position. 3. Configure actual display mirroring using KScreen instead of relying on identical monitor coordinates. I believe this information may be useful for investigating how Plasma 6.8.0 handles existing multi-monitor configurations, especially when two outputs share the same position. It would also be worth investigating whether the display configuration migration or restoration process can leave previously mirrored outputs in an inconsistent state. I am happy to provide further diagnostic information if needed. One additional detail regarding my original monitor setup: The Samsung TV was permanently configured to mirror my primary monitor through KDE System Settings while running Plasma 6.7.5. I did not manually enable or disable mirroring depending on whether I wanted to use the TV. The TV remained physically connected to my computer at all times and was normally left in standby mode when not in use. This configuration worked correctly under Plasma 6.7.5, including when the TV was in standby. This may be relevant when investigating whether Plasma 6.8.0 incorrectly restores an existing display mirroring configuration, particularly when a connected display is in standby during startup or an upgrade. -- You are receiving this mail because: You are watching all bug changes.
