Goldstar is the old name of the LG corporation. The problem is logged in your dmesg.txt:
[ 10.609475] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery reached max voltage [ 10.609494] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed This probably also causes the later: [ 46.014534] [drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed: 5 tries [ 46.014557] [drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed Does this issue still occur with the latest Xenial 4.4.0-45.66 kernel? -- 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/1570653 Title: 4K Monitor not detected properly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1570653/+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
