Comment # 6 on bug 1082725 from James Wang

(In reply to Takashi Iwai from comment #3)
> First off, try to boot both on working (the previous one) and broken
> (4.4.114) kernels, and check the output of "modinfo i915 | grep file" in
> both cases.
> 
> If both point to */weak-updates/* path, it's OK.  If only one of them show
> the different path (*/kernel/drivers/...), it's the problem.  Or if both
They are different, 
In 4.4.104-39, it's */weak-updates/*, 
In 4.4.114-42, it's
/lib/modules/4.4.114-42-default/updates/drivers/gpu/drm/i915/i915.ko

> show */kernel/drivers/*, it's also OK.
> 
> Once after that, try to boot 4.4.114 kernel with drm.debug=0x0e boot option.
> Give the kernel journal log at the crash.

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