From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-acpi@vger.kernel.org, bugme-daemon@bugzilla.kernel.org,
khashayar.lists@gmail.com, "Rafael J. Wysocki" <rjw@sisk.pl>,
Zhang Rui <rui.zhang@intel.com>
Subject: Re: [Bugme-new] [Bug 12235] New: /sys/devices/virtual/backlight/acpi_video0/brightness has it backwards
Date: Tue, 16 Dec 2008 20:55:32 +0000 [thread overview]
Message-ID: <20081216205532.GB14332@srcf.ucam.org> (raw)
In-Reply-To: <20081216100023.2e437c8c.akpm@linux-foundation.org>
On Tue, Dec 16, 2008 at 10:00:23AM -0800, Andrew Morton wrote:
> OK, that's weird. I have a suspicion that we're about to find out that
> this is intentional, but I don't know what the fix is..
My recollection is that some BIOSes provide the list of brightness
values in reverse order - someone posted a patch to sort them in-kernel,
but I can't remember what happened to it. xbacklight will work because
it triggers a direct write to the hardware if the acpi driver isn't
loaded.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2008-12-16 20:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-12235-10286@http.bugzilla.kernel.org/>
2008-12-16 18:00 ` [Bugme-new] [Bug 12235] New: /sys/devices/virtual/backlight/acpi_video0/brightness has it backwards Andrew Morton
2008-12-16 20:55 ` Matthew Garrett [this message]
2008-12-17 0:57 ` Zhang Rui
2008-12-17 9:44 ` Khashayar Naderehvandi
2008-12-17 19:56 ` Khashayar Naderehvandi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20081216205532.GB14332@srcf.ucam.org \
--to=mjg59@srcf.ucam.org \
--cc=akpm@linux-foundation.org \
--cc=bugme-daemon@bugzilla.kernel.org \
--cc=khashayar.lists@gmail.com \
--cc=linux-acpi@vger.kernel.org \
--cc=rjw@sisk.pl \
--cc=rui.zhang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox