LCD Brightness adjustment is not working

[Hans]

Binary package hint: acpi-support

Hi,

I installed Ubuntu 10.04 on my new Dell Inspiron 14R with Intel HD graphics . Problem is I am not able to adjust the brightness either using brightness applet or the hot keys.

Details are given below

Sha:/proc/acpi/video/GFX0# pwd

/proc/acpi/video/GFX0

find . -type d -exec cat {}/info \;
Switching heads: yes
Video ROM: no
Device to be POSTed on boot: no
device_id: 0x0008
type: UNKNOWN
known by bios: no
device_id: 0x0007
type: UNKNOWN
known by bios: no
device_id: 0x0006
type: UNKNOWN
known by bios: no
device_id: 0x0005
type: UNKNOWN
known by bios: no
device_id: 0x0004
type: UNKNOWN
known by bios: no
device_id: 0x0003
type: UNKNOWN
known by bios: no
device_id: 0x0002
type: UNKNOWN
known by bios: no
device_id: 0x0001
type: UNKNOWN
known by bios: no

ls -l /sys/class/backlight/
total 0

I tried to disable the ACPI driver by changing the /etc/default/grub content to acpi_backlight=vendor, but still same issue.

It seems like new feature request

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 12)

Shammi