Bug #1087967 also looks related (lots of i915 messages, culminating in "Error: Driver 'i915' is already registered, aborting...", an oops in register_ftrace_event, and random malfunction thereafter).
Bug #1087967 also looks related (lots of i915 messages, culminating in "Error: Driver 'i915' is already registered, aborting...", an oops in register_ ftrace_ event, and random malfunction thereafter).