Hi,

Is the formula in https://www.qubes-os.org/doc/gui-configuration/ both
wrong and incomplete?

The correct calculation (for 8-bit displays) seems to be:

(3840 * 2160 + 1920 * 1080) * 4 / 1024 = 40500

If e.g. the 4K screen is 10-bit, this means 1.25 bytes, i.e.

((3840 * 2160) * 1.25  + ( 1920 * 1080 )) * 4 / 1024 = 48600

The doc does not address 10-bit displays.

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