[SOLVED] Slackware 64 current, AMD Ryzen 3 4300 Radeon Gfx - no X11

Hi,

Attempting an infrequent hardware upgrade, X desktop is not starting. Hardware is pretty new: ASUS PN50 NUC, Ryzen 3 4300 with onboard Radeon something or other. Kernel is 5.4.59 (current huge)

In the xorg log a couple of errors:

Code:...
[ 7347.176] (II) LoadModule: "radeon"
[ 7347.176] (II) Loading /usr/lib64/xorg/modules/drivers/radeon_drv.so
[ 7347.176] (II) Module radeon: vendor="X.Org Foundation"
[ 7347.176] compiled for 1.20.5, module version = 19.1.0
[ 7347.176] Module class: X.Org Video Driver
[ 7347.176] ABI class: X.Org Video Driver, version 24.0
[ 7347.176] (II) LoadModule: "modesetting"
[ 7347.176] (II) Loading /usr/lib64/xorg/modules/drivers/modesetting_drv.so
[ 7347.176] (II) Module modesetting: vendor="X.Org Foundation"
[ 7347.176] compiled for 1.20.8, module version = 1.20.8
[ 7347.176] Module class: X.Org Video Driver
[ 7347.176] ABI class: X.Org Video Driver, version 24.1
[ 7347.176] (II) LoadModule: "fbdev"
[ 7347.176] (WW) Warning, couldn't open module fbdev
[ 7347.176] (EE) Failed to load module "fbdev" (module does not exist, 0)
[ 7347.176] (II) LoadModule: "vesa"
[ 7347.176] (II) Loading /usr/lib64/xorg/modules/drivers/vesa_drv.so
[ 7347.176] (II) Module vesa: vendor="X.Org Foundation"
[ 7347.176] compiled for 1.20.0, module version = 2.4.0
[ 7347.176] Module class: X.Org Video Driver
[ 7347.176] ABI class: X.Org Video Driver, version 24.0
[ 7347.176] (II) RADEON: Driver for ATI/AMD Radeon chipsets:
ATI Radeon Mobility X600 (M24), ATI FireMV 2400,
ATI Radeon Mobility X300 (M24), ATI FireGL M24 GL,
ATI Radeon X600 (RV380), ATI FireGL V3200 (RV380),
...
[ 7347.181] (EE) open /dev/dri/card0: No such file or directory
[ 7347.181] (WW) Falling back to old probe method for modesetting
[ 7347.181] (EE) open /dev/dri/card0: No such file or directory
[ 7347.181] (EE) Screen 0 deleted because of no matching config section.
[ 7347.181] (II) UnloadModule: "modesetting"
...lsmod is listing 'amdgpu' but no 'radeon' related modules. What am I missing? I'm guessing there is no support for the weird embedded Radeon in the Ryzen chip? A newer Kernel might help?

Any pointers?
Thanks