Why does a mosaic of "screenshots" appear when booting Linux?

Question

linux

Shutting down Windows 10 by rebooting. Linux boots (Ubuntu 16.04 LTS). At the moment the system boots, the monitor turns off, then turns on and for a few seconds you can see an image that contains a huge number of screenshots of various sizes from the Windows system, like puzzles. On each "puzzle" there is a different image, as if someone randomly photographed, and then decided to make a collage. How is this possible, what could be the reason for the mystical effect?

Answer 1

If the "screenshots" are not relevant to your Windows system (and even more so if there is none on this computer), then this is the NVidia logo that is displayed by the proprietary driver when it starts. In theory, this can be disabled with the command sudo nvidia-xconfig --no-logo