https://bugzilla.kernel.org/show_bug.cgi?id=211033
--- Comment #9 from Artur Bac (arturbac.ab@gmail.com) --- I can confirm this regression with AMD Radeon RX 5700 XT (NAVI10, DRM 3.40.0, 5.10.3, LLVM 11.0.0) I have display only on one monitor of 2 connected with 5.10.4 and 5.10.5