How to get VIRTUAL1 with AMD radeon driver about virtscreen HOT 3 OPEN

I have the same issue.
Graphics: Device-1: Intel 3rd Gen Core processor Graphics driver: i915 v: kernel Device-2: Advanced Micro Devices [AMD/ATI] Thames [Radeon HD 7550M/7570M/7650M] driver: radeon v: kernel Display: x11 server: X.Org 1.20.8 driver: vesa unloaded: fbdev,modesetting resolution: 1366x768~60Hz OpenGL: renderer: AMD TURKS (DRM 2.50.0 / 5.4.0-42-generic LLVM 10.0.1) v: 3.3 Mesa 20.2.0-devel (git-3a4024e 2020-07-22 focal-oibaf-ppa)

At the moment the radeon driver doesn't have support to Virtual Displays, at least is what I've found reading the man radeon. Thus, the solution presented by @MarcoEddizzo83 here will not work since it requires the amdgpu driver, not available to Pre-GCN GPUs.

from virtscreen.

I am also interested in this issue , as i turned my head around last 3 days trying to enable the VIRTUAL1 via the xorg .conf files

Graphics: Device-1: Advanced Micro Devices [AMD/ATI] Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM] driver: radeon v: kernel Display: x11 server: X.Org 1.20.8 driver: radeon unloaded: intel resolution: 1920x1080~60Hz, 1920x1080~60Hz OpenGL: renderer: AMD CAICOS (DRM 2.50.0 / 5.4.28-rt19-MANJARO LLVM 9.0.1) v: 3.3 Mesa 20.0.4

from virtscreen.

Hey. For ATI/AMD user I belive I foud some sort of solution. Posted here:
AMD/ATI VIRTUAL DISPLAY
Hope it helps (and that is working) !!!

from virtscreen.