It appears your laptop specs: https://psref.lenovo.com/syspool/Sys/PDF/ThinkPad/ThinkPad_E15_Gen_4_AMD/ThinkPad_E15_Gen_4_AMD_Spec.pdf
show the HDMI port only supports HDMI 1.4b and the specs explicitly say: HDMI® supports up to 3840x2160@30Hz USB-C® supports up to 4096x2160@60Hz So please configure your HDMI monitor for 30Hz only, or a lower resolution. You can use the LG monitor at 4K-60Hz if it is connected by a USB-C cable or adapter. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2162071 Title: Monitor fails to resume from sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2162071/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
