Comment 26 for bug 1685794

At boot, the kernel waits for mouse movements to initialize the random number generator.
Kernel messages on boot:
[code]
sudo dmesg | less
[/code]

The problem:
[code]
kernel: random: crng init done
[/code]

The solution:
[code]
sudo apt install haveged
sudo systemctl enable haveged
[/code]