Your display identified itself as unfamiliar and resolution adjustment is not possible for the version 18.04 LTS.
Your display identified itself as unfamiliar and resolution adjustment is not possible for the version 18.04 LTS.
I restarted the system and noticed the resolution shifted to 1024x768 (4:3). My monitor’s default is 1600x900 (16:9), and I can’t adjust it. When using xrandr, it shows a failure message about gamma size. The issue seems linked to the GTX 1050Ti with the driver installed. I fixed it by updating to the latest NVIDIA driver.
Have you attempted a restart once more? Were any updates applied prior to the reboot?