So I got this weird bug – I updated my Pop_OS install and now Linux doesn’t boot anymore. I should probably boot from USB and fix this. I could figure it out on my own, but maybe it will be good knowledge for people searching on engines so any advice is welcome. Windows still boots properly. Let’s give people some alternatives to reddit :)
My common solution to boot issues that lock me out is,
Get a USB Live distro (always good to have a backup lying around)
Boot into live distro
Chroot into the broken distro (Arch wiki has an article on this)
Fix any bugs that I can find and/or reinstall the bootloader
Test, repeat until the problem has been found and fixed
Hope it helps any newcomers!
Popos also has specific guides for these common errors:
https://support.system76.com/articles/bootloader