Was linux-firmware the only package upgraded, or were other packages also upgraded at the same time? Have you confirmed that reverting back to linux-firmware 1.197 fixes the issue?
** Changed in: linux-firmware (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1931900 Title: Linux-firmware 1.197.1 breaks dual monitor on RX480, shows mirror display with "Unknown Device" under GUI To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1931900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs