I've added in the 4.17 kernel and now all three screens work, however it does not get the type of the other display and does not have the right resulution (1920x1080), it is connected via a displayport-> hdmi adapter.
** Attachment added: "Screenshot from 2018-05-08 18-30-03.png" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1769733/+attachment/5136245/+files/Screenshot%20from%202018-05-08%2018-30-03.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1769733 Title: Third screen not working displayport amd ryzen 5 2400g apu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1769733/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs