Comment # 2 on bug 1155938 from Takashi Iwai

They are no real crash but rather kernel warnings with stack traces.  It's not
good, but it's not the direct cause of the kernel panic you faced in the later
stage (complete freeze with the LED flushing).

It's not clear whether the kernel panic is from the i915 stuff.  Is the problem
reproducible?  If yes, please set up kdump and try to capture the crash.