I'm using an RX 480 and also have the same problem on kernels 4.18 and 4.20 (tested using 4.20.0-042000 from https://kernel.ubuntu.com/~kernel- ppa/mainline/v4.20/). Adding "amdgpu.dc=0" to GRUB fixes the problem in both cases.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1790861 Title: amdgpu.dc dual monitor issues when trying to sleep / power off the monitors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1790861/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
