Created attachment 306802 [details]
KDE Plasma display configuration panel

Starting with v6.11-rc6, KDE Plasma and xrandr list two displays on my laptop, even though only the internal screen is connected. Bisecting between v6.11-rc5 and v6.11-rc6, the first bad commit appears to be b49420d6a1aeb399e5b107fc6eb8584d0860fbd7.

Machine/software specs:
Framework Laptop 13 Intel Core Ultra Series 1
Intel Core Ultra 5 125H
2880x1920 120 Hz display
Fedora 40, KDE Plasma 6.1.4 on Wayland, Mesa 24.1.6

This is the output of xrandr:

Screen 0: minimum 16 x 16, current 8640 x 3840, maximum 32767 x 32767
eDP-1 connected primary 2880x1920+0+0 (normal left inverted right x axis y axis) 290mm x 190mm
   2880x1920    119.97*+
   2048x1536    119.95
   1920x1440    119.97
   1600x1200    119.82
   1440x1080    119.92
   1400x1050    119.90
   1280x1024    119.83
   1280x960     119.89
   1152x864     119.77
   1024x768     119.80
   800x600      119.85
   640x480      119.52
   320x240      117.34
   2560x1600    119.93
   1920x1200    119.90
   1680x1050    119.89
   1440x900     119.94
   1280x800     119.85
   1152x720     119.73
   960x600      119.74
   928x580      119.55
   800x500      119.47
   768x480      119.71
   720x480      119.65
   640x400      119.64
   320x200      117.55
   2880x1620    119.95
   2560x1440    119.95
   2048x1152    119.96
   1920x1080    119.93
   1600x900     119.95
   1368x768     119.83
   1280x720     119.86
   1024x576     119.85
   864x486      119.69
   720x400      119.54
   640x350      119.24
Unknown-1 connected 5760x3840+2880+0 (normal left inverted right x axis y axis) 762mm x 508mm
   5760x3840     59.98*+
   2048x1536     59.95
   1920x1440     59.97
   1600x1200     59.87
   1440x1080     59.99
   1400x1050     59.98
   1280x1024     59.89
   1280x960      59.94
   1152x864      59.96
   1024x768      59.92
   800x600       59.86
   640x480       59.38
   320x240       59.52
   2560x1600     59.99
   1920x1200     59.88
   1680x1050     59.95
   1440x900      59.89
   1280x800      59.81
   1152x720      59.97
   960x600       59.63
   928x580       59.88
   800x500       59.50
   768x480       59.90
   720x480       59.71
   640x400       59.95
   320x200       58.96
   5120x2880     59.99
   4096x2304     59.99
   3840x2160     59.98
   3200x1800     59.96
   2880x1620     59.96
   2560x1440     59.96
   2048x1152     59.90
   1920x1080     59.96
   1600x900      59.95
   1368x768      59.88
   1280x720      59.86
   1024x576      59.90
   864x486       59.92
   720x400       59.55
   640x350       59.77

I attached a screenshot of the KDE display configuration panel.

Pardon me if this is the wrong place to report this issue and this belongs to the KDE issue tracker instead.