Still testing 4.7.0-994-generic. It again isn't freezing. Perhaps the
time it froze was not because of the main issue. Hard to say, very
confusing. If nothing else i believe it is more stable, but it still has
sporadic freezing problems of some sort.

I've heard reports of even macs having freezing problems in the latest
updates. Do macs and linux share open source kernel code and drivers?
Could it be the same problem, that some sort of Intel driver for i915
has just had a poorly written driver which is causing all kinds of
freezing problems among a range of systems?

I really wish this could have been fixed by now. Just frustrating. I
know code regressions happen, but freezing kernels are a bad one.

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https://bugs.launchpad.net/bugs/1575467

Title:
  [Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
  utopic-vy2yyy/linux-lts-
  utopic-3.16.0/drivers/gpu/drm/i915/intel_display.c:1743
  vlv_wait_port_ready+0x126/0x170 [i915]()

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