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

[Kamal Mostafa]

Testers -- thanks very much for your valuable feedback.  Note that this
"i915 brightness" fix has NOT yet been applied to the Ubuntu development
kernel, but it has now been submitted for comments to the relevant
upstream development teams.  For the time being, the fix is only
available in the test kernels that I post to this bug, which I'll need
to update after each intervening kernel release.

The latest build for Lucid is available here:  http://kernel.ubuntu.com/~kamal/i915bri~3e/latest-lucid/  (source patch in the parent directory).  To install this kernel, download the two .deb files and install them using:
    sudo dpkg -i linux*kamal*.deb

Note that the test kernel also includes the fixes for LP: #553498 and
LP: #573120 (even though the acpi_backlight= boot option is not required
for the Dell Studio 155x with this kernel).

After rebooting, verify that "dmesg | grep backlight" yields the following line, signifying that the backlight will be controlled by the i915 driver:
    acpi device:04: registered as backlight/i915

Feedback to this bug report will be much appreciated, from Intel GPU-
based (i915 driver) systems.

-- 
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 linux in ubuntu.