From: Aaron Lu <aaron.lu@intel.com>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: linux-acpi@vger.kernel.org,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <lenb@kernel.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ACPI / video: Add HP EliteBook Revolve 810 to the blacklist
Date: Wed, 12 Feb 2014 10:31:59 +0800 [thread overview]
Message-ID: <52FADD1F.90209@intel.com> (raw)
In-Reply-To: <20140207102523.GO18029@intel.com>
On 02/07/2014 06:25 PM, Mika Westerberg wrote:
> On Fri, Feb 07, 2014 at 09:29:58AM +0800, Aaron Lu wrote:
>> On 02/03/2014 06:59 PM, Mika Westerberg wrote:
>>> On HP EliteBook Revolve 810 the ACPI backlight device doesn't work as
>>> expected. For example when resuming from system sleep, it seems to lose
>>> backlight settings.
>>>
>>> Forcing Intel driver fixes the problem so add this machine the ACPI
>>> video detect blacklist.
>>
>> For reference's purpose, can you please file a bug to kernel bugzilla
>> under the ACPI/Power-Video category and attach the acpidump and dmesg
>> there? Thanks.
>
> Done, the bug is here:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=70231
>
> I noticed that using only the acpi_video0 for tuning backlight works but if
> I use intel_backlight directly, on resume I get values from acpi_video0
> instead. I'm not really familiar how this is supposed to work, though so
> please let me know if I'm missing something.
Thanks for the report, as communicated on the bug page, your system is
already blacklisted for win8 by commit:
commit 2d4054d8422462cb2771fdb4eb1925df55d2b320
Author: Takashi Iwai <tiwai@suse.de> Fri Dec 20 00:09:12 2013
Committer: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Fri Dec 20 22:50:56 2013
ACPI: Blacklist Win8 OSI for some HP laptop 2013 models
And the fact that acpi_video interface works made it not appropriate to
add your system into the video_detect_dmi_table. You can just use acpi_video
interface and everything should work fine.
next prev parent reply other threads:[~2014-02-12 2:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-03 10:59 [PATCH] ACPI / video: Add HP EliteBook Revolve 810 to the blacklist Mika Westerberg
2014-02-07 1:29 ` Aaron Lu
2014-02-07 10:25 ` Mika Westerberg
2014-02-12 2:31 ` Aaron Lu [this message]
2014-02-12 9:34 ` Mika Westerberg
2014-02-13 1:09 ` Aaron Lu
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