You have installed packages from the 'oibaf' PPA, which is unsupported and frequently broken:
version.libdrm2: libdrm2 2.4.100+git1910210630.c69c9c~oibaf~b version.libgl1-mesa-dri: libgl1-mesa-dri 19.3~git1910240730.196165~oibaf~b version.libgl1-mesa-glx: libgl1-mesa-glx 19.3~git1910240730.196165~oibaf~b version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0+git1910151930.b9bd80~oibaf~b version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git1910071930.bff5ec~oibaf~b version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16+git1906080730.ec2b45~oibaf~b Please uninstall the PPA from your machine and then open a new bug if you still have trouble. ** Tags added: nvidia ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Invalid -- 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/1849666 Title: can not see hdmi To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1849666/+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