https://bugs.freedesktop.org/show_bug.cgi?id=92518
--- Comment #9 from benli1392@gmail.com --- I just checked the logs again and I found out that I did not enable DRI3 correctly.
I updated my openSUSE Tumbleweed system to kernel 4.3 and tried to enable DRI3 by creating a 20-radeon.conf file at /etc/X11/xorg.conf.d/ with the contents:
Section "Device" Identifier "Radeon 7870 XT" Option "DRI3" "on" EndSection
I restarted and checked the Xorg.0.log and it seems that DRI3 is not used even when specified to. I am attaching the newest dmesg and xorg logs.