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

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Message-ID: <CA+i8gKKGBviLBaS8b=swqv2OWgh2Uc+m-TT8LVYcPehcYd903A@mail.gmail.com>
Date:	Thu, 13 Nov 2014 22:37:14 +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,

Thanks for your reply and very sorry for the belated reply, some gmail
filtering issues...

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.

Thanks a lot,
Emmanuel

Download attachment "kernel_bad.tar.xz" of type "application/octet-stream" (16184 bytes)

Download attachment "kernel_good.tar.xz" of type "application/octet-stream" (16200 bytes)