[gm45] brightness control previously work after xrandr invocation now does not

Binary package hint: x11-xserver-utils

on Jaunty, brightness control doesn't work on default, but then works ok after executing
xrandr --output LVDS --set BACKLIGHT_CONTROL native

on Karmic, that command returns error:
$ xrandr --output LVDS --set BACKLIGHT_CONTROL native
X Error of failed request: BadRROutput (invalid Output parameter)
  Major opcode of failed request: 149 (RANDR)
  Minor opcode of failed request: 15 (RRGetOutputProperty)
  Serial number of failed request: 26
  Current serial number in output stream: 26

$ xrandr --prop
$ xrandr --prop
Screen 0: minimum 320 x 200, current 2304 x 1280, maximum 8192 x 8192
VGA1 connected 1024x1280+1280+0 right (normal left inverted right x axis y axis) 338mm x 270mm
 EDID_DATA:
  00ffffffffffff004c2db70137314148
  041101030e221b782aaaa5a654549926
  145054bfef8081808140714f01010101
  010101010101302a009851002a403070
  1300520e1100001e000000fd00384b1e
  510e000a202020202020000000fc0053
  796e634d61737465720a2020000000ff
  00484d44503131363238330a20200064
   1280x1024 60.0*+ 75.0
   1152x864 75.0
   1024x768 75.1 70.1 60.0
   832x624 74.6
   800x600 72.2 75.0 60.3 56.2
   640x480 72.8 75.0 66.7 60.0
   720x400 70.1
LVDS1 connected 1280x800+0+0 (normal left inverted right x axis y axis) 304mm x 190mm
 EDID_DATA:
  00ffffffffffff0006af444400000000
  01100103801e13780a7fe59355508c27
  22505400000001010101010101010101
  010101010101ee1a0080502010301520
  350030be100000180000000f00000000
  00000000000000000020000000fe0041
  554f0a202020202020202020000000fe
  004231343145573034205634200a00be
 BACKLIGHT: 8 (0x00000008) range: (0,10)
 Backlight: 8 (0x00000008) range: (0,10)
 scaling mode: Fullscreen
  supported: Non-GPU Fullscreen No scale Aspect
   1280x800 60.0*+
   1024x768 85.0 75.0 70.1 60.0
   832x624 74.6
   800x600 85.1 72.2 75.0 60.3 56.2
   640x480 85.0 72.8 75.0 59.9
   720x400 85.0
   640x400 85.1
   640x350 85.1
DP1 disconnected (normal left inverted right x axis y axis)

# changing output to LVDS1 gives different error:
$ xrandr --output LVDS1 --set BACKLIGHT_CONTROL native
X Error of failed request: BadName (named color or font does not exist)
  Major opcode of failed request: 149 (RANDR)
  Minor opcode of failed request: 11 (RRQueryOutputProperty)
  Serial number of failed request: 27
  Current serial number in output stream: 27

ProblemType: Bug
Architecture: amd64
Date: Sun Nov 15 19:32:34 2009
DistroRelease: Ubuntu 9.10
MachineType: LENOVO Lenovo 3000 G430
NonfreeKernelModules: ksplice_axmidaqs_vmlinux_new ksplice_axmidaqs
Package: x11-xserver-utils 7.4+2ubuntu3
ProcCmdLine: root=UUID=02b224b8-00cf-4e6d-93be-48765c1db182 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=id_ID.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu10
 libgl1-mesa-glx 7.6.0-1ubuntu4
 libdrm2 2.4.14-1ubuntu1
 xserver-xorg-video-intel 2:2.9.0-1ubuntu2
 xserver-xorg-video-ati N/A
SourcePackage: x11-xserver-utils
Uname: Linux 2.6.31-14-generic x86_64
dmi.bios.date: 08/11/2008
dmi.bios.vendor: LENOVO
dmi.bios.version: 0ECN41WW
dmi.board.name: LE6
dmi.board.vendor: Lenovo
dmi.board.version: Rev 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Lenovo
dmi.chassis.version: Rev 1.0
dmi.modalias: dmi:bvnLENOVO:bvr0ECN41WW:bd08/11/2008:svnLENOVO:pnLenovo3000G430:pvrRev1.0:rvnLenovo:rnLE6:rvrRev1.0:cvnLenovo:ct10:cvrRev1.0:
dmi.product.name: Lenovo 3000 G430
dmi.product.version: Rev 1.0
dmi.sys.vendor: LENOVO
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: x86_64kernel: 2.6.31-14-generic

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
     Subsystem: Lenovo Device [17aa:3a02]