Fresh installation Ubuntu 20.04 LTS with all updates / Fresh installation with all updates 22.04 LTS.
Thinkpad X230 and external display. Default resolution external display 2560x1440. After screenlock the external display has a different resolution. Sometimes 1920x1080 or 1280x720. Only unplugging and plugging it back solves the problem.
Fresh installation Ubuntu 20.04 LTS with all updates / Fresh installation with all updates 22.04 LTS.
Thinkpad X230 and external display. Default resolution external display 2560x1440. After screenlock the external display has a different resolution. Sometimes 1920x1080 or 1280x720. Only unplugging and plugging it back solves the problem.