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-driver-390 nvidia-dkms-390 and then reboot (because the Nvidia web site tells me your GPU is only supported by driver version 390). You can also find other kernels to test at https://kernel.ubuntu.com /~kernel-ppa/mainline/?C=M;O=D ** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers-390 (Ubuntu) ** Also affects: linux-hwe-5.8 (Ubuntu) Importance: Undecided Status: New ** Summary changed: - Nvidia + Nvidia resolution is stuck at 640x480 since kernel 5.8.0-45.51~20.04.1-generic ** Tags added: nvidia regression-update ** Also affects: nvidia-graphics-drivers-460 (Ubuntu) Importance: Undecided Status: New ** Changed in: linux-hwe-5.8 (Ubuntu) Importance: Undecided => High ** Changed in: nvidia-graphics-drivers-390 (Ubuntu) Importance: Undecided => High ** Changed in: nvidia-graphics-drivers-460 (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1919285 Title: Nvidia resolution is stuck at 640x480 since kernel 5.8.0-45.51~20.04.1-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.8/+bug/1919285/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
