Solved: XPS 15 on Pop OS 20.04 gui got stuck after updating firmware

Previously, I have updated the firmware several times, so when I saw there's a new update, I clicked the "Update" button without too much thoughts. Yes, I got trouble this time. I got a black screen while the system is not dead. I can log into the system by pressing Alt+Ctrl+F2, no gui, but I can do something to fix it. It is good enough. I searched on my cellphone to try find something. And the following article helped me.

System76 login-loop-pop

In my case, I guess that the root cause could be the nvidia driver, so I followed the [Reinstall NVIDIA Driver] section in that article and it did save my life.

# remove current driver
sudo apt purge ~nnvidia
sudo apt autoremove
sudo apt clean
# reinstall it
sudo apt update
sudo apt full-upgrade
sudo apt install system76-driver-nvidia

In case someone else got trapped into the same situation, I wrote my solution here and hope it helps.

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