[Bug 568611] Re: Screen brightness control fails on Dell Studio 1558

[Triyambakesh]

Dear Kamal,
Thankyou for your response to my question. I look forward for the solution that u would be formulating/ designing regarding the screen brightness..... 
Please let me know when you will load the program in the UBUNTU web page.... Thank you once again.....
Warm Regards ,TRIYAMBAKESH MOHANTY (M.Sc)
(MICROBIOLOGIST)
Microbiology & Molecular Biology of Mycobacteria & Tuberculosis
E-MAIL: triyambakesh at yahoo.com
Mobile No: +91-9536466494
Stay connected
http://in.linkedin.com/pub/triyambakesh-mohanty/19/99a/953
http://www.brijj.com/triyambakesh-mohanty

--- On Thu, 9/23/10, Kamal Mostafa <kamal at canonical.com> wrote:

From: Kamal Mostafa <kamal at canonical.com>
Subject: [Bug 568611] Re: Screen brightness control fails on Dell Studio 1558
To: triyambakesh at yahoo.com
Date: Thursday, September 23, 2010, 1:14 AM

Status update:

The upstream maintainers of the i915 driver have recently proposed a new
backlight control mechanism[1], so my "i915bri" patch won't be applied
to the mainline kernel or the official Ubuntu kernels.  The good news is
that the new proposed mechanism is a better approach and will likely fix
the problem for more machines.

I am therefore focusing my efforts on backporting the new proposed
mechanism to Ubuntu Maverick (2.6.35 kernel) and I expect to publish a
Maverick PPA kernel (and the patches) here soon.  This work is not
likely to make it into the Maverick release in October.  I have not yet
evaluated whether or not it will be possible to backport this new
mechanism to Ubuntu Lucid.

Some folks have asked whether I'm planning to port my "i915bri" patch to
Maverick or other 2.6.35-based distros:  Since the new mechanism will
soon be available for Maverick, I do not intend to do so.

[1] http://lists.freedesktop.org/archives/intel-
gfx/2010-September/008081.html

-- 
Screen brightness control fails on Dell Studio 1558
https://bugs.launchpad.net/bugs/568611
You received this bug notification because you are a direct subscriber
of the bug.

Status in The Dell Project: Invalid
Status in “alsa-driver” package in Ubuntu: Invalid
Status in “linux” package in Ubuntu: In Progress

Bug description:
Attempts (on a current Lucid beta) to control the screen brightness on
my Dell Studio 1558 fail with the following errors reported in dmesg:

 [ 1162.236365] ACPI: Failed to switch the brightness
 [ 1162.379144] ACPI: Failed to switch the brightness
 [ 1162.538226] ACPI: Failed to switch the brightness
 [ 1162.667358] ACPI: Failed to switch the brightness
 [ 1162.784171] ACPI: Failed to switch the brightness

This is true both for the keyboard's brightness controls (Fn-F4,
Fn-F5) and for a gnome-brightness-applet on the panel.

Output of acpidump, dmesg and lspci is attached.

To unsubscribe from this bug, go to:
https://bugs.launchpad.net/dell/+bug/568611/+subscribe

-- 
Screen brightness control fails on Dell Studio 1558
https://bugs.launchpad.net/bugs/568611
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to Canonical OEM Projects.