Comment # 19 on bug 1004052 from David Disseldorp

(In reply to Takashi Iwai from comment #18)
...
> So, another try is to revert a change in dell_laptop driver.  I changed
> dell_laptop kmp now, so try it later once when the build finishes.  (Check
> the changelog.)

I hit the same lock-up with dell_laptop-kmp-default-4.4_k4.4.24_1-5.1 ("revert
a dell_laptop commit").