From: Aaron Lu <aaron.lu@intel.com>
To: John Marsden <john.d.marsden@gmail.com>
Cc: linux-acpi@vger.kernel.org
Subject: Re: PROBLEM: [Toshiba Portege Z835] Brightness control lost after suspend
Date: Thu, 31 Jul 2014 16:09:48 +0800 [thread overview]
Message-ID: <20140731080947.GD20462@aaronlu.sh.intel.com> (raw)
In-Reply-To: <CACiopZA=5wHsjjzOKrC7aqCp13g8vLwnegcdFrySoS-_kD60Aw@mail.gmail.com>
On Wed, Jul 30, 2014 at 06:11:02PM +0100, John Marsden wrote:
> On 30 July 2014 09:32, Aaron Lu <aaron.lu@intel.com> wrote:
> > Does the other interface work after resume? I mean the intel_backlight
> > and the toshiba one?
>
> The intel-backlight interface works but the toshiba one does not work.
Please add acpi_backlight=vendor to kernel cmdline and see if that makes
the backlight work. What it does is to tell ACPI video module not to
create the acpi_videoX sysfs interface and let's see if X server will
pick up the intel_backlight one.
Best wishes,
Aaron
next prev parent reply other threads:[~2014-07-31 8:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-28 20:52 PROBLEM: [Toshiba Portege Z835] Brightness control lost after suspend John Marsden
2014-07-29 14:28 ` Aaron Lu
2014-07-29 18:20 ` John Marsden
2014-07-30 8:32 ` Aaron Lu
2014-07-30 17:11 ` John Marsden
2014-07-31 8:09 ` Aaron Lu [this message]
2014-07-31 21:05 ` John Marsden
2014-08-01 2:42 ` Aaron Lu
2014-08-04 20:32 ` John Marsden
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