When starting X without any xorg.conf, kernel panics with the attached image output.
Attaching dmesg and pciconf -lv in next message
Created attachment 179690 [details]
kernel panic on startx
Created attachment 179691 [details]
Created attachment 179692 [details]
Do you still experience this problem with recent FreeBSD versions? Note that DRM support had moved out of the base system/kernel to the `graphics/drm-*-kmod' and `graphics/gpu-firmware-kmod' ports.
Your report was against 11.0-STABLE which is no longer supported. Please update to contemporary, supported FreeBSD version and reconduct your tests.
Adding x11@ to CC list so it can be tracked while originally filed under base system/kern.
I've been running the vesa driver ever since, I will try again but I believe it still panics with non KMS capable amd/ati video cards. I'll confirm with 12.2 when I get the machine updated.