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[trendzetter <joris.willems@xxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

xrandr is missing a backlight property:
$ xrandr --prop
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
	EDID_DATA:
		00ffffffffffff0030e4020200000000
		00130103802313780a28659759548e27
		1e505400000001010101010101010101
		010101010101561d56c6500020303020
		350059c2100000190000000000000000
		00000000000000000000000000fe004c
		4720446973706c61790a2020000000fc
		004c503135365748332d544c41310039
	scaling mode:	Fullscreen
		supported: Non-GPU      Fullscreen   No scale     Aspect      
   1366x768       60.0*+
   1360x768       59.8  
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
DVI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)

xbacklight -set 10
No outputs have backlight property

The buttons on my keyboard activate the brightness control on screen but the brightness does not change.
I am using a fresh karmic install. I read something about KMS. Karmic is using KMS by default I read. It seems to be related to these posts:
http://bugs.freedesktop.org/show_bug.cgi?id=20963

ProblemType: Bug
Architecture: amd64
Date: Fri Sep 11 20:42:15 2009
DistroRelease: Ubuntu 9.10
MachineType: Acer Aspire 5810T
Package: xserver-xorg-video-intel 2:2.8.1-1ubuntu1
PccardctlIdent:
 
PccardctlStatus:
 
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-10-generic root=UUID=d9aeca27-f2de-4b4b-ac98-9ff714300820 ro quiet splash libata.force=noncq usbcore.autosuspend=1
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-10.32-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.6.0~git20090817.7c422387-0ubuntu3
 libdrm2 2.4.13-1ubuntu1
 xserver-xorg-video-intel 2:2.8.1-1ubuntu1
 xserver-xorg-video-ati 1:6.12.99+git20090825.fc74e119-0ubuntu1
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.31-10-generic x86_64
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 06/24/2009
dmi.bios.vendor: INSYDE
dmi.bios.version: V1.23
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 5810T
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvrV1.23:bd06/24/2009:svnAcer:pnAspire5810T:pvrV1.23:rvnAcer:rnAspire5810T:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
dmi.product.name: Aspire 5810T
dmi.product.version: V1.23
dmi.sys.vendor: Acer
fglrx: Not loaded
system:
 distro:             Ubuntu
 architecture:       x86_64kernel:             2.6.31-10-generic

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
xrandr backlight property control missing (when using KMS?)
https://bugs.launchpad.net/bugs/428054
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