I had xorg errors during installing FreeBSD in UEFI Mode. I tried many methods to fix it. But nothig fixed. So I tried in Legacy Mode. In Legacy Mode, everything is ok. I don't understand so much why not available in UEFI Mode. My PC has two HDDs(1 TB & 300GB). On 1TB Drive, I am running Debian GNU/Linux in UEFI Mode. I would like to install FreeBSD on 300GB Drive. Now I successfully installed FreeBSD with Gnome3 DE in Legacy Mode. But I still have graphic errors. I can't control brightness, night mode doen't work. I tried the instructions from FreeBSD Handbook, but nothing fixed.