[Bug 98690] [i915][SKL] System freeze when starting X using kernel 4.9-rc1 or later

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98690

Paul Donohue <freedesktop-bugs at PaulSD.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|bisect_pending              |bisected

--- Comment #5 from Paul Donohue <freedesktop-bugs at PaulSD.com> ---
I have not yet been able to figure out why the packages on
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc3/ and my builds of those
same commits do not behave the same.

However, I started bisecting again from scratch, being careful to avoid taking
any shortcuts (such as assuming that I could skip a build because I had a
pre-built copy for the commit), and also being careful to do extra testing at
each step (it turns out there are other problems that occasionally produce
similar-looking symptoms, so I had to do extra testing to ensure that I was
consistently reproducing this specific issue).

I've now managed to successfully bisect the issue to commit
339fd36238dd3494bc4617d181e7a37922c29ee9.

Just to double check this, I also built v4.9-rc5, verified that it reliably
hangs when starting X, then reverted 339fd36238dd3494bc4617d181e7a37922c29ee9
and re-built v4.9-rc5, and verified that it reliably works correctly.

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