Comment 2 for bug 1919364

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Daniel van Vugt (vanvugt) wrote : Re: After update display resolution is only 640X480

It sounds like the Nvidia driver is not happy with the new kernel.

Please try booting an older kernel or forcefully reinstalling the Nvidia kernel driver:

  sudo apt install --reinstall nvidia-dkms-460

and then reboot.

You can also find other kernels to test at https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D