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Subject: Re: Critical regression in 4.7-rcX
To: =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= <ville.syrjala@linux.intel.com>,
        Daniel Vetter <daniel.vetter@ffwll.ch>
References: <4f3efccf-5d73-d69f-5d79-2107537a8815@lwfinger.net>
 <alpine.LFD.2.20.1607151550300.30105@vaio.linux-foundation.org>
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 <20160715144330.GI4329@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        intel-gfx <intel-gfx@lists.freedesktop.org>
From: Larry Finger <Larry.Finger@lwfinger.net>
Message-ID: <e51b2dab-e552-3e41-e47c-4ef62c826936@lwfinger.net>
Date: Fri, 15 Jul 2016 09:53:32 -0500
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On 07/15/2016 09:43 AM, Ville Syrjälä wrote:
> On Fri, Jul 15, 2016 at 04:27:27PM +0200, Daniel Vetter wrote:
>> On Fri, Jul 15, 2016 at 8:55 AM, Linus Torvalds
>> <torvalds@linux-foundation.org> wrote:
>>> On Thu, 14 Jul 2016, Larry Finger wrote:
>>>> To anyone keeping track of regressions in kernel 4.7, I call your attention to
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=96675.
>>>>
>>>> This bug causes driver i915 to fail to connect to the display, and results in
>>>> a blank screen as soon as the kernel is loaded. The only way to operate with
>>>> kernel 4.7 is to add "nomodeset" to the command line. The problem was bisected
>>>> to commit f21a21983ef13a ("drm/i915: Splitting intel_dp_detect").
>>>
>>> Daniel? Jani? Time to revert?
>>
>> Yup. Means that I'll get to revert a pile of patches (plus even more
>> in -next), but that's what we get for not handling regressions timely.
>> Dave poked me about the same bug already too. But will take a few days
>> until the pull is in your inbox I guess.
>
> I attached a oneliner to the bug today, that I *think* should fix the
> problem.

Unfortunately, that patch did not help. If you have any other patches, or a repo 
I can pull from for testing, please let me know.

Larry