Comment 8 for bug 1661987

I have the same exact problem. I'm running a xps 13 (processor/gpu: intel i7 10510U). I'm using this connector: https://www.dell.com/en-ie/work/shop/dell-adapter-usb-c-to-hdmi-dp-with-power-pass-through/apd/470-aegy/pc-accessories#techspecs_section My monitor is a BenQ EL2870U, I'm using 4K resolution.

My colours are all wrong whenever I dare to change any configuration or if I connect the monitor after boot. It seems to work fine if I boot it already connected.

This is the output of xrandr (while it works fine):

XWAYLAND0 connected 3840x2160+1920+0 (0x24) normal (normal left inverted right x axis y axis) 620mm x 340mm
 Identifier: 0x21
 Timestamp: 14712
 Subpixel: unknown
 Gamma: 1.0:1.0:1.0
 Brightness: 0.0
 Clones:
 CRTC: 0
 CRTCs: 0
 Transform: 1.000000 0.000000 0.000000
             0.000000 1.000000 0.000000
             0.000000 0.000000 1.000000
            filter:
 non-desktop: 0
  supported: 0, 1
  3840x2160 (0x24) 266.750MHz -HSync +VSync *current +preferred
        h: width 3840 start 4056 end 4456 total 5072 skew 0 clock 52.59KHz
        v: height 2160 start 2163 end 2168 total 2192 clock 23.99Hz