Created attachment 200816 [details]
xorg.log and part of /var/log/messages
My system is FreeBSD 12.0-RELEASE (amd640), new installed on the new hard drive.
Computer is iMac with Radeom 4850 graphics card, the boot is UEFI and everything works except graphics card problem.
When I kldload /boot/modules/radeonkms.ko I got black screen and computer is still responsive.
I try also to boot computer with hw.syscons.disable=1 in /boot/loader.conf and in /etc/rc.conf I have kldload /boot/modules/radeonkms.ko
and again black screen.
I have installed drm-legacy-kmod and xf86-video-ati-legacy but I tried also with new ati driver and drm for 12 and the same result.
On the old system when I use ati driver version 7.9 and kldload radeon.ko from kernel worked without problem. On the old system the new ATI driver didn't work and none of the drm-kmod didn't work too.
Now I am using scfb driver and it works.
I do not know if is a bug in the drivers or something else.
Please check attached logs.
Created attachment 200894 [details]
try to use drm-fbsd11.2-kmod from ports with atilegacy
I deinstall drm-legacy-kmod and install drm-fbsd11.2-kmod but again black screen.
Please, check attaced logs.
I did try to run FreeBSD 11.2 on the borrowed dock station and it boot (slow but...) and everything was O.K. - no black screen when switched to fb. I did also "startx" and open Openbox.
The difference from the new system is that on the old drive I had freebsd-boot and uefi partitions but on the new one I have just uefi.