linux-kernel - Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P

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Date:	Fri, 30 Oct 2015 09:50:44 +0900
From:	Michel Dänzer <michel@...nzer.net>
To:	Simon Wood <simon@...gewell.org>
Cc:	linux-kernel@...r.kernel.org,
	Ville Syrjälä <ville.syrjala@...ux.intel.com>,
	Samuel Ortiz <samuel@...tiz.org>
Subject: Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on
 Thinkpad T60P

On 29.10.2015 23:26, Simon Wood wrote:
> On Thu, October 29, 2015 8:07 am, Simon Wood wrote:
>>
> 
>>> Well, I can confirm that the patch stopped the Oops - but unfortunatly
>>> the screen is still dark.
>>>
>>> Also, Oops _does_ happen with rc2 but the screens is OK with that...
>>> Back
>>> to looking through the logs.
>>
>> I couldn't see anything of note in the syslog, so attempted to bisect the
>>  problem some - although building takes considerable time on this machine
>>  (note 32bit).
>>
>>
>> 4.3.0rc6 - bad
>> 4.3.0rc7 - bad
>> 4.3.0rc2 - good
>> 4.3.0rc4 - bad (049e6dde7e57f0054fdc49102e7ef4830c698b46)
>> 4.3.0rc3 - good (9ffecb10283508260936b96022d4ee43a7798b4c)
>>
>>
>> So problem (no LCD backlight) must have been introduced between those.
> 
> Well this looks like it might have something to do with it.... will
> attempt a build just before it.
> --
> commit 4281f46ef839050d2ef60348f661eb463c21cc2e
> Author: Michel Dänzer <michel.daenzer@....com>
> Date:   Mon Sep 28 18:16:31 2015 +0900
> 
>     drm/radeon: Restore LCD backlight level on resume (>= R5xx)

Please try the patches from
http://lists.freedesktop.org/archives/dri-devel/2015-October/093514.html .


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer
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