linux-kernel - Re: [BUG] rc1 and rc2: Laptop unusable: on boot,screen black instead of native resolution

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Date:	Mon, 23 Jun 2014 16:46:31 +0200
From:	Martin Kepplinger <martink@...teo.de>
To:	Zhang Rui <rui.zhang@...el.com>
CC:	"rjw@...ysocki.net" <rjw@...ysocki.net>,
	"lenb@...nel.org" <lenb@...nel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-media@...r.kernel.org
Subject: Re: [BUG] rc1 and rc2: Laptop unusable: on boot,screen black instead
 of native resolution

Am 2014-06-23 15:14, schrieb Zhang Rui:
> On Mon, 2014-06-23 at 14:22 +0200, Martin Kepplinger wrote:
>> Am 2014-06-23 03:10, schrieb Zhang, Rui:
>>>
>>>
>>>> -----Original Message-----
>>>> From: Martin Kepplinger [mailto:martink@...teo.de]
>>>> Sent: Sunday, June 22, 2014 10:25 PM
>>>> To: Zhang, Rui
>>>> Cc: rjw@...ysocki.net; lenb@...nel.org; linux-acpi@...r.kernel.org;
>>>> linux-kernel@...r.kernel.org
>>>> Subject: [BUG] rc1 and rc2: Laptop unusable: on boot,screen black
>>>> instead of native resolution
>>>> Importance: High
>>>>
>>>> Since 3.16-rc1 my laptop's just goes black while booting, instead of
>>>> switching to native screen resolution and showing me the starting
>>>> system there. It's an Acer TravelMate B113 with i915 driver and
>>>> acer_wmi. It stays black and is unusable.
>>>>
> This looks like a duplicate of
> https://bugzilla.kernel.org/show_bug.cgi?id=78601
> 
> thanks,
> rui
I'm not sure about that. I have no problem with v3.15 and the screen
goes black way before a display manager is started. It's right after the
kernel loaded and usually the screen is set to native resolution.

Bisect told me aaeb2554337217dfa4eac2fcc90da7be540b9a73 as the first bad
one. Although, checking that out and running it, works good. not sure if
that makes sense.

>>>> Do you have other people complain about that? Bisecting didn't lead to
>>>> a good result. I could be wrong but I somehow suspect the mistake to be
>>>> somewhere in commit 99678ed73a50d2df8b5f3c801e29e9b7a3e5aa85
>>>>
>>> In order to confirm if the problem is introduced by the above commit,
>>> why not checkout the kernel just before and after this commit and see if the problem exists?
>>>
>>> Thanks,
>>> rui
>>>
>> So maybe I was wrong. d27050641e9bc056446deb0814e7ba1aa7911f5a is still
>> good and aaeb2554337217dfa4eac2fcc90da7be540b9a73 is the fist bad one.
>> This is a big v4l merge. I added the linux-media list in cc now.
>>
>> What could be the problem here?
>>
>>>
>>>> There is nothing unusual in the kernel log.
>>>>
>>>> This is quite unusual for an -rc2. Hence my question. I'm happy to test
>>>> changes.
>>>>
>>>>                                      martin
>>>> --
>>>> Martin Kepplinger
>>>> e-mail        martink AT posteo DOT at
>>>> chat (XMPP)   martink AT jabber DOT at
>>
> 
> 

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