I have this issue too. (@Anders Aagaard, thanks for the tty2
workaround).
Distro: Ubuntu 20.04.2 LTS (Focal Fossa)
Kernel: 5.4.0-66-generic x86_64
compiler: gcc v: 9.3.0
Desktop: Gnome 3.36.4
wm: gnome-shell
dm: GDM3 3.36.3
Graphics:
Device-1: Advanced Micro Devices [AMD/ATI] Ellesmere [Radeon RX
470/480/570/570X/580/580X/590]
driver: amdgpu
Display: server: X.Org 1.20.9
driver: amdgpu
compositor: gnome-shell
OpenGL: renderer: AMD Radeon RX 480 Graphics (POLARIS10 DRM 3.35.0
5.4.0-66-generic LLVM 11.0.0) v: 4.6 Mesa 20.2.6
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https://bugs.launchpad.net/bugs/1916950
Title:
[amdgpu] Screen fails to wake up after sleep
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