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[Bug 508737] Re: [gm45] samsung x360-aa03 backlight control does not work with KMS

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: Sergey <sergey@xxxxxxxxxxxxxxx>
Date: Wed, 24 Feb 2010 05:42:09 -0000
Reply-to: Bug 508737 <508737@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Tried Lucid, alpha-2, x86_64. No improvement. Gnome indicator shows
brightness changes, but no visual effect.

I've build a kernel module, based on Greg Kroah-Hartman code 
http://lists.freedesktop.org/archives/intel-gfx/2009-August/003942.html
which controls the brightness via SABI, installed it, booted kernel with acpi_backlight=vendor option, and got correct brightness control. The project at http://code.google.com/p/easy-slow-down-manager/ contains samsung-backlight module with this code. 
Maybe you could consider incorporating SABI support into the kernel (or at least ubuntu kernel)? I've came across lots of messages from Samsung laptop owners with the same problem.

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[gm45] samsung x360-aa03 backlight control does not work with KMS
https://bugs.launchpad.net/bugs/508737
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