xser 1.84 doesn't start

[Stari Karp]

I did update to 1.18.4 on FreeBSD 11-RELEASE (amd64) and now it doesn't start anymore.
My graphics card:
vendor='Advanced Micro Devices, Inc. [AMD/ATI]
device="RV770/MP8L
[Mobility Radeon HD 4850}'

My system is FreeBSD 11-RELEASE (amd64) installed on iMac and it works from version 7 and desktop from 10. I didn't have any problem with previous versions of xorg-server.

And my xorg.log:

http://pastebin.com/PQ16aF25

I am using Synth and I have the previous version packages of Xorg saved. Should I downgrade the xserver with the old packages or should I use portdowngrade or is something which I should do to star working again. 
Thank you.