linux-kernel - Re: [Regression] 83f45fc turns machine's screen off

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Message-ID: <CA+i8gKJPPPUXrxY5q+81xZG91azygoUb27R_Wid3GTpb3-1-rw@mail.gmail.com>
Date:	Sun, 14 Dec 2014 02:07:19 +0100
From:	Emmanuel Benisty <benisty.e@...il.com>
To:	Daniel Vetter <daniel.vetter@...ll.ch>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...ux.ie>,
	intel-gfx <intel-gfx@...ts.freedesktop.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: [Regression] 83f45fc turns machine's screen off

Hi Daniel,

> On Mon, Nov 10, 2014 at 10:19 PM, Daniel Vetter <daniel.vetter@...ll.ch> wrote:
>> Adding relevant mailing lists.
>>
>>
>> On Sat, Nov 8, 2014 at 7:34 PM, Emmanuel Benisty <benisty.e@...il.com> wrote:
>>> Hi,
>>>
>>> The following commit permanently turns my screen off when x server is
>>> started (i3 330M Ironlake):
>>>
>>>     [83f45fc360c8e16a330474860ebda872d1384c8c] drm: Don't grab an fb
>>> reference for the idr
>>>
>>> Reverting this commit fixed the issue.
>>
>> This is definitely unexpected. I think we need a bit more data to
>> figure out what's going on here:
>> - Please boot with drm.debug=0xe added to your kernel cmdline and grab
>> the dmesg right after boot-up for both a working or broken kernel.
>
> Please see attached files.
>
>> - Are you using any special i915 cmdline options?
>
> Nope.

Is there anything else I could provide to help fixing this issue? It's
still in Linus' tree.

Thanks in advance.
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