I noticed this bug on an Lenovo Ideapad S340-14API. The system runs Mint 20.2 with Kernel 5.4.0.89, but I upgraded, because I had the problem with the previous Mint version as well. Plugging in power supply lets the system boot into graphics mode. It also helps to boot into the rescue mode via grub and then just say resume.
I noticed this bug on an Lenovo Ideapad S340-14API. The system runs Mint 20.2 with Kernel 5.4.0.89, but I upgraded, because I had the problem with the previous Mint version as well. Plugging in power supply lets the system boot into graphics mode. It also helps to boot into the rescue mode via grub and then just say resume.