Could you please try reverting this patch and see if you can still reproduce the issue:
git show 0d68b25e9ceb344fe2f93373b1c0311d33814265 commit 0d68b25e9ceb344fe2f93373b1c0311d33814265 Author: Tom O'Rourke <email address hidden> Date: Wed Apr 9 11:44:06 2014 -0700
drm/i915/bdw: Use timeout mode for RC6 on bdw
Could you please try reverting this patch and see if you can still reproduce the issue:
git show 0d68b25e9ceb344 fe2f93373b1c031 1d33814265 fe2f93373b1c031 1d33814265
commit 0d68b25e9ceb344
Author: Tom O'Rourke <email address hidden>
Date: Wed Apr 9 11:44:06 2014 -0700
drm/i915/bdw: Use timeout mode for RC6 on bdw