I think that fixed it. To add `amdgpu.dc=0`, you must edit your grub configuration
https://askubuntu.com/questions/1029517/amd-rx480-screen-flicker-after- update-to-18-04#1032198 >To do this, edit the file /etc/default/grub, for example using >sudoedit /etc/default/grub >Find the line beginning GRUB_CMDLINE_LINUX_DEFAULT and add the text >amdgpu.dc=0 between the double quotes (""). Leave any other parameters as they >are. For example, you may end up with a line like this: >GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.dc=0" >Save the file and exit, and then run >sudo update-grub >to write the configuration, and reboot. After doing this, the resolution is detected correctly and appears normal in the 4.15.0-38-generic kernel. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799613 Title: In kernel 4.14.59, monitor resolution is detected correctly. In kernels after that, they are not detected correctly. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799613/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
