I installed the latest version of kali in my system. Afte installing and working it was just fine and when i wnet out to eat and then combackand saw the pc screen was turned off . I pressed all the keys in keyboard and mouse and couldnt go to login page . The screen was blank . I manually restared the pc and i saw no files are in my pc and all were deleted. I dont have boot or anything . The second time i dleted the kali and reinstall it and it happened to me agian the same scenario but this time when i restart the pc i went to initramfs. My pc has nvidia driver and i think its because of that . I had the same issues in ubuntu on my laptob when screen is locked but after restarting it will be fixed