acpi_hp - cannot adjustment backlight on Comapaq 6715s

[Alex Keda]

Hi all!
When I test acpi_hp first - it be patchset for current (8)
All work OK
Now, it part kernel sourses, and not working adjustment screen 
brightness (Fn+F9/Fn+F10). But, if I unplug power cord - lightness set 
to minimum. If I plug power cord - is go to maximum.

HP# cat /dev/hpcmi
Serial Port                                Enable
Infrared Port                              Enable
Parallel Port                              Enable
Flash Media Reader                         Enable
USB Ports including Express Card slot      Enable
1394 Port                                  Enable
Cardbus Slot                               Enable
Express Card Slot                          Disable
F9, F10 and F12 Delay(Sec)                 0
USB Device Detection Delay (Sec)           0
Multiboot                                  Enable
Express Boot Popup Delay(Sec)              0
CD-ROM Boot                                Enable
Floppy Boot                                Enable
Internal Network Adapter Boot              Enable
Internal Network Adapter Boot Mode         PXE
Swap Fn/Ctrl Key                           Disable
USB Legacy Support                         Enable
Parallel Port Mode                         Standard
BIOS DMA Data Transfers                    Enable
Fan Always on while on AC Power            Disable
Data Execution Prevention                  Disable
LAN Power Saving                           Enable
SATA Native Mode                           Disable
Dual Core CPU                              Disable
Secondary Battery Fast Charge              Enable
Windows Vista Direct App Launch            Disable
HDD Translation Mode                       LBA-assisted
Virtualization Technology                  Enable
USB HDD Translation Mode                   LBA-assisted
Embedded WLAN Device Radio                 Enable
Embedded WWAN Device Radio                 Enable
Fingerprint Device                         Enable
Optical Disk Drive                         Enable
Network Interface Controller (LAN)         Enable
Ambient Light Sensor                       Disable
Integrated Camera                          Disable
Internal Modem                             Disable
Embedded Bluetooth Device Radio            Enable
LAN/WLAN Switching                         Disable
Wake on LAN                                Enable
Stringent Security                         Disable
Require Password On Restart                Disable
Smart Card Power-On Support                Disable
Reset of Embedded Security Device from OS  Disable
OS Management of Embedded Security Device  Disable
Activate Embedded Security On Next Boot    Disable
Embedded Security Activation Policy        F1 to Boot
Embedded Security Device Availability      Available
Power-On Authentication Support            Disable
Automatic Drivelock Support                Disable
Intel Active Management Technology         Enable
Terminal Emulation Mode                    ANSI
USB Key Provisioning Support               Enable
Firmware Verbosity                         Enable
Firmware Progress Event Support            Enable
HP#


HP# sysctl dev.acpi_hp
dev.acpi_hp.0.%desc: HP ACPI-WMI Mapping
dev.acpi_hp.0.%driver: acpi_hp
dev.acpi_hp.0.%location: handle=\_SB_.C011
dev.acpi_hp.0.%pnpinfo: _HID=PNP0C01 _UID=0
dev.acpi_hp.0.%parent: acpi0
dev.acpi_hp.0.wlan_enabled: 1
dev.acpi_hp.0.wlan_radio: 1
dev.acpi_hp.0.wlan_on_air: 1
dev.acpi_hp.0.wlan_enable_if_radio_on: 0
dev.acpi_hp.0.wlan_disable_if_radio_off: 0
dev.acpi_hp.0.bt_enabled: 1
dev.acpi_hp.0.bt_radio: 1
dev.acpi_hp.0.bt_on_air: 1
dev.acpi_hp.0.bt_enable_if_radio_on: 0
dev.acpi_hp.0.bt_disable_if_radio_off: 0
dev.acpi_hp.0.wwan_enabled: 1
dev.acpi_hp.0.wwan_radio: 1
dev.acpi_hp.0.wwan_on_air: 0
dev.acpi_hp.0.wwan_enable_if_radio_on: 0
dev.acpi_hp.0.wwan_disable_if_radio_off: 0
dev.acpi_hp.0.als_enabled: 4
dev.acpi_hp.0.display: 65793
dev.acpi_hp.0.hdd_temperature: 4
dev.acpi_hp.0.is_docked: 0
dev.acpi_hp.0.cmi_detail: 7
dev.acpi_hp.0.verbose: 1
HP#