Correct way to enable FreeSync in Manjaro KDE?

Hi, I have been struggling enabling FreeSync on my system, and I finally managed to do it.
But I found few articles/posts, some works, other not.

Could you please let me know if I set it up correctly ?
(my set up info are placed at the end)

First,

/etc/X11/xorg.conf.d/10-amdgpu.conf 
Section "Device"
       Identifier "Device0"
       Driver "amdgpu" # create black screen
       VariableRefresh "true" # create blackscreen
EndSection

Setting up this setting leads to blackscreen (can access TTY). Is that normal ?
So, I cannot use it

Second, enabling in grub:

GRUB_CMDLINE_LINUX="amdgpu.freesync_video=1"

systool -vm amdgpu | grep "freesync"                                                                                                                ✔ 
    freesync_video      = "1"

Finally, in Display / Adaptive Sync set to Automatic

Additionally, to void conflict between FreeSync and VSync :
do I need to set in 10-amdgpu.conf the Option “TearFree” “false” ?
Or is it the same as unticking Display / Screen Tearing ?

My system info:

System:
  Host: xxx Kernel: 6.9.5-1-MANJARO arch: x86_64 bits: 64
  Desktop: KDE Plasma v: 6.0.5 Distro: Manjaro Linux
Graphics:
  Device-1: AMD Navi 23 [Radeon RX 6600/6600 XT/6600M] driver: amdgpu
    v: kernel
  Display: wayland server: X.org v: 1.21.1.13 with: Xwayland v: 24.1.0
    compositor: kwin_wayland driver: X: loaded: modesetting dri: radeonsi
    gpu: amdgpu resolution: 3127x1309
  API: EGL v: 1.5 drivers: radeonsi,swrast
    platforms: wayland,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 24.1.1-manjaro1.1
    renderer: AMD Radeon RX 6600 (radeonsi navi23 LLVM 17.0.6 DRM 3.57
    6.9.5-1-MANJARO)
  API: Vulkan v: 1.3.279 drivers: radv surfaces: xcb,xlib,wayland
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
           video-linux            2024.05.06                true            PCI
     video-modesetting            2020.01.13                true            PCI
            video-vesa            2017.03.12                true            PCI