I have a MSI GS66 laptop with Nvidia RTX3060. It has dual boot Windows 10 and Ubuntu 21.04. I would like to reinstall the Ubuntu partition to 21.10. I downloaded Ubuntu 21.10 installation iso file and created a bootable usb flash by using Rufus tool. Then I logged into Windows 10 and had the Ubuntu 21.04 installation partition deleted. I rebooted the laptop to start the installation. However in the installation wizard it didn't show any installation type. If I clicked Install Now to install Ubuntu, it showed the following errors: "No root file system. No root file system is defined. Please correct this from the partitioning menu." Fast boot was disabled. Something must be broken in Ubuntu 21.10 installation process as I had no such issue when I installed Ubuntu 21.04 on the same laptop. I left 600 GB SSD for Ubuntu. The installation wizard failed to find such partition.
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