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Tags: drivers   nvidia   18.04   display-resolution   4k-monitor   grub  
Link: πŸ” See Original Answer on Ask Ubuntu πŸ”—

Title: No more 4K Screen Resolution after Kernel Upgrade
ID: /2018/09/25/No-more-4K-Screen-Resolution-after-Kernel-Upgrade
Created: September 25, 2018
Upload: November 24, 2022    Layout:  post
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Rather than reinstalling Ubuntu after a kernel update, boot with the older kernel.

From the Grub menu, select β€œAdvanced Options” and from there you can select your older (original) kernel that works:

This image generated by that displays your grub menu without rebooting. Your real grub menu would look different during boot.

The original kernel version should still work. Then keep trying out new kernels that Ubuntu installs until the bug is fixed. Then after using the most recent kernel you can remove older kernels using:

sudo apt autoremove
⇧ Xrandr shows HDMI1 disconnect w/ HDMI2 as primary with only one monitor A new command combining apt update && apt upgrade in 18.04 or some later beta?  β‡©