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[Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P

Started by"Simon Wood" <simon@mungewell.org>
First post2015-10-29 15:10 +0100
Last post2015-10-30 15:00 +0100
Articles 6 — 2 participants

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  [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad  T60P "Simon Wood" <simon@mungewell.org> - 2015-10-29 15:10 +0100
    Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad  T60P "Simon Wood" <simon@mungewell.org> - 2015-10-29 15:30 +0100
      Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad  T60P "Simon Wood" <simon@mungewell.org> - 2015-10-29 23:20 +0100
      Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on  Thinkpad T60P Michel Dänzer <michel@daenzer.net> - 2015-10-30 02:00 +0100
        Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on  Thinkpad T60P "Simon Wood" <simon@mungewell.org> - 2015-10-30 03:50 +0100
          Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on  Thinkpad T60P "Simon Wood" <simon@mungewell.org> - 2015-10-30 15:00 +0100

#1258811 — [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P

From"Simon Wood" <simon@mungewell.org>
Date2015-10-29 15:10 +0100
Subject[Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P
Message-ID<qoW3U-1al-7@gated-at.bofh.it>
> 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.
Simon

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#1258822

From"Simon Wood" <simon@mungewell.org>
Date2015-10-29 15:30 +0100
Message-ID<qoWng-1hg-17@gated-at.bofh.it>
In reply to#1258811
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@amd.com>
Date:   Mon Sep 28 18:16:31 2015 +0900

    drm/radeon: Restore LCD backlight level on resume (>= R5xx)
--

Cheers,
Simon

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#1259041

From"Simon Wood" <simon@mungewell.org>
Date2015-10-29 23:20 +0100
Message-ID<qp3I7-60Z-17@gated-at.bofh.it>
In reply to#1258822
On Thu, October 29, 2015 8:26 am, Simon Wood wrote:
>> 4.3.0rc6 - bad
>> 4.3.0rc7 - bad
>> 4.3.0rc2 - good
>> 4.3.0rc4 - bad (049e6dde7e57f0054fdc49102e7ef4830c698b46)
>> 4.3.0rc3 - good (9ffecb10283508260936b96022d4ee43a7798b4c)

> --
> commit 4281f46ef839050d2ef60348f661eb463c21cc2e Author: Michel Dänzer
> <michel.daenzer@amd.com>
> Date:   Mon Sep 28 18:16:31 2015 +0900
>
>
> drm/radeon: Restore LCD backlight level on resume (>= R5xx)
> --

I can confirm that this is 'bad' (no backlight).

Although confusing this built labelled as rc2, despite being dated after
rc3 tag... double checking what I built.
--
simon@retrobox:~/linux-git$ git status
HEAD detached at 4281f46
--

Simon

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#1259141 — Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P

FromMichel Dänzer <michel@daenzer.net>
Date2015-10-30 02:00 +0100
SubjectRe: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P
Message-ID<qp6cV-7oo-1@gated-at.bofh.it>
In reply to#1258822
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@amd.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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#1259180 — Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P

From"Simon Wood" <simon@mungewell.org>
Date2015-10-30 03:50 +0100
SubjectRe: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P
Message-ID<qp7Vn-8u2-5@gated-at.bofh.it>
In reply to#1259141
On Thu, October 29, 2015 6:50 pm, Michel Dänzer wrote:

>>> 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@amd.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

Awesome sauce!

4281f46ef839050d2ef60348f661eb463c21cc2e + 2 patches works (backlight is
lit).

BTW my GFX is:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
RV530/M56 GL [Mobility FireGL V5200]

Patches apply cleanly to Master too, will build overnight and test first
thing tomorrow,
Simon

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#1259502 — Re: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P

From"Simon Wood" <simon@mungewell.org>
Date2015-10-30 15:00 +0100
SubjectRe: Re: [Regression] 4.3.0rc4 through rc7: No LCD backlight on Thinkpad T60P
Message-ID<qpinL-6tx-1@gated-at.bofh.it>
In reply to#1259180
On Thu, October 29, 2015 8:39 pm, Simon Wood wrote:
> On Thu, October 29, 2015 6:50 pm, Michel Dänzer wrote:
>
>
>>>> 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@amd.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
>>
>
> Awesome sauce!
>
>
> 4281f46ef839050d2ef60348f661eb463c21cc2e + 2 patches works (backlight is
> lit).
>
> BTW my GFX is:
> 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
> RV530/M56 GL [Mobility FireGL V5200]
>
>
> Patches apply cleanly to Master too, will build overnight and test first
> thing tomorrow, Simon

Confirmed the patches work with master/rc7, backlight is working!

So the big question is whether we can get these included in 4.3 final...?
Simon.


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