1. It sounds like there's a problem with the HDMI connection. Do you only see problems on the HDMI display? Sounds like there's a problem with the "GSM" (LG) display.
[ 647.719] (--) modeset(0): HDMI max TMDS frequency 225000KHz [ 647.746] (WW) EDID timing clock 328.32 exceeds claimed max 175MHz, fixing [ 647.746] (--) modeset(0): HDMI max TMDS frequency 225000KHz [ 647.760] (II) modeset(0): EDID vendor "GSM", prod id 23243 2. Please attach a photo of the problem. 3. Please try selecting 'Ubuntu on Wayland' from the login screen. Does that avoid the problem? ** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu) ** Changed in: xorg-server (Ubuntu) Status: New => Incomplete -- 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/1876970 Title: Display is sshowing a line when watching a video To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1876970/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp