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From: Jani Nikula <jani.nikula@intel.com>
To: Romain Francoise <romain@orebokech.com>,
	Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Subject: Re: v3.14-rc7: Backlight control broken on Dell XPS13
Date: Mon, 17 Mar 2014 17:42:46 +0200	[thread overview]
Message-ID: <87y508rfux.fsf@intel.com> (raw)
In-Reply-To: <87txawzx30.fsf@intel.com>

On Mon, 17 Mar 2014, Jani Nikula <jani.nikula@intel.com> wrote:
> On Mon, 17 Mar 2014, Romain Francoise <romain@orebokech.com> wrote:
>> Hi Daniel,
>>
>> Daniel Vetter <daniel.vetter@ffwll.ch> writes:
>>
>>> Please never just send a mail to maintainers, always cc mailing lists.
>>
>> Yes, sorry, I sent this privately because it wasn't a fully-formed bug
>> report; I just wanted Jani to confirm that it wasn't intentionally
>> broken as of -rc7.
>>
>>> Have you tested with the patch reverted to confirm that it's indeed
>>> this commit and not something else (e.g. in the acpi code)?
>>
>> I hadn't, but I've now reverted the revert and things work again as in
>> v3.13. So as far as I can tell the quirk is still definitely needed.
>
> I still don't think having the quirk is the way to go. Let's fix this
> properly, shall we?
>
> Please file a new bug on DRM/Intel component at [1]. Please attach
> intel_reg_dumper output (tool from intel-gpu-tools [2]) with and without
> the revert. Please also attach dmesg with drm.debug=0xe from early boot.

The register dump from *before* i915 gets loaded is also interesting.

BR,
Jani.

>
> Do you have the snb or ivb model?
>
> BR,
> Jani.
>
>
> [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI
> [2] http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/
>
>>
>> Thanks!
>> -r
>
> -- 
> Jani Nikula, Intel Open Source Technology Center
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Jani Nikula, Intel Open Source Technology Center

  reply	other threads:[~2014-03-17 15:43 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <87eh213q70.fsf@kima.orebokech.com>
2014-03-17 13:44 ` v3.14-rc7: Backlight control broken on Dell XPS13 Daniel Vetter
2014-03-17 14:05   ` Romain Francoise
2014-03-17 15:03     ` Jani Nikula
2014-03-17 15:42       ` Jani Nikula [this message]
2014-03-17 16:34         ` Romain Francoise
2014-03-17 16:41     ` Jani Nikula
2014-03-17 17:27       ` Romain Francoise

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