Conflicting Video Drivers

[bsdcatch22]

I have FreeBSD on a Dell Precision M6800, which has a Radeon/ATI/AMD video card. I plan to use it on a docking station, then through KVM. I plan to load KDE5.

Problem Statement:
DRM driver loaded: Docking station works, Xorg does not work.
DRM driver disabled, Docking station doesn't work, Xorg does work.

DRM Driver Load:
Install the drm-kmod package
$ sudo pkg install drm-kmod

/etc/rc.conf call:

kld_list="/boot/modules/radeonkms.ko"

. Tested this to work on Dock Station and KVM (physical 4x KVM), terminal only, pre Xorg.

startx without config, and it freezes. (Log attached). Looks like its loading a Radeon.so by default.
startx with config (attached), and it freezes. (Log attached -config).

Commented out the rc.conf line above, the single line. startx loaded x OK, but the video does not work on the Dock Station. The Keyboard and Mouse still do.

I am a brand new user, and I looked everywhere and tried most everything that made sense to me. I delayed this post until I figured out the script command and setup FTP to my win machine, so I could provide the logs/screens.
Since I need the Dock Station, is there any way to get Xorg to read the same video driver, and make it work?

 

[tingo]

Check the relevant bits of pciconf -lv output (that is: any sections with "vga" in it) with and without the docking station connected. Are there any differences?

 

[bsdcatch22]

There is no difference in the pciconf output. dmesg shows the drm loading for both, with different drivers.
Tried by compiling the xorg port, which is 3 hours I wish I had back. Thank you for your reply. 3 days trying to fix video reminds me of the eisa days, with jumpers and things.

I don't have it in me. I don't know how to close this thread, but its not needed anymore. Cheers.