Does that finally target those occasional problems I get:
Support for completing page-flips that have been stuck in a GPU hang. This change should prevent OpenGL compositors from being stuck.
After that I need to re-login because of heavy tearing and quite "unaccellerated" feeling (slow scrolling, slow window moving etc.)
[10745.636467] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[10745.636471] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state