Yur amdgpu is a render offload target, and does not have outputs as you said.
In order to use it for offloading, you need to run an app with 'DRI_PRIME=1 app'. There is no better support for that in the desktop environment to control it, so it needs to be done manually like that.. ** Changed in: xserver-xorg-video-amdgpu (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1649060 Title: amdgpu does not find any output when using dedicated (AMD) card To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-amdgpu/+bug/1649060/+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