When forcing a linux(ubuntu) there might be a file system issue and it after restarting it throws a dark terminal with error like ‘couldn’t get size 0x8000000’
So to solve the issue you have to use the ‘fsck’ command . In the error message it clearly shows the partition in which there is error . So find out the partition and use the fsck command. In my case there is error in the partition /dev/nvme0n1p2
So in the terminal use
After that it will provide with various of options so simply go on typing ‘y’ in each option then at the end reboot the OS.