Created attachment 118335 [details] Xorg log I recently updated mesa to 11.0.0. Now, if I boot and sddm (0.12.0) is started Xorg uses one core for itself, sddm never shows up and can't be killed. Even switching to another tty doesn't work anymore, or attaching gdb to try to see what's going on. When I downgrade to 10.6.7 everything is back to normal. I've attached Xorg.0.log. Please let me know, if more information is needed.
It seems it wasn't mesa's fault. Upgrading the kernel from 4.2.0 to 4.2.1 (or later) fixed this for me.
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