From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
lenb@kernel.org
Subject: Re: [PATCH 1/3] ACPI: Provide config option to disable BIOS brightness changes on power events
Date: Fri, 17 Feb 2012 19:37:42 +0000 [thread overview]
Message-ID: <20120217193742.GA11132@srcf.ucam.org> (raw)
In-Reply-To: <20120217192704.GB2707@elf.ucw.cz>
On Fri, Feb 17, 2012 at 08:27:04PM +0100, Pavel Machek wrote:
> Hi!
>
> > The default ACPI behaviour is to instruct the BIOS to automatically change
> > brightness on power events. This may be undesirable for distributions who
> > manage brightness in userspace. Provide a config option that disables this
> > behaviour and leaves brightness control up to the OS.
>
> Should this be configured during runtime?
>
> Like... when userspace power management starts, it disables this?
This is ACPI-specific. It's not emulated by any of the other backlight
drivers. There's no terribly easy way to have generic userspace handle
it.
--
Matthew Garrett | mjg59@srcf.ucam.org
prev parent reply other threads:[~2012-02-17 19:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-03 15:18 [PATCH 1/3] ACPI: Provide config option to disable BIOS brightness changes on power events Matthew Garrett
2012-02-03 15:18 ` [PATCH 2/3] ACPI: Provide config option to control automatic brightness switching Matthew Garrett
2012-02-03 15:18 ` [PATCH 3/3] pcie: Add support for setting default ASPM policy Matthew Garrett
2012-02-10 20:31 ` Jesse Barnes
2012-02-17 19:27 ` [PATCH 1/3] ACPI: Provide config option to disable BIOS brightness changes on power events Pavel Machek
2012-02-17 19:37 ` Matthew Garrett [this message]
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