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On Sun, Apr 21, 2024 at 06:30:37PM -, qubist wrote:
> 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.
It doesn't matter what your display is using, the memory allocated in VM
for the frame buffer is 32-bits per pixel.
- --
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
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