I am using Ubuntu 12.04 LTS on my Packard Bell EasyNote TS11HR-127GE laptop and I cannot adjust the brightness. If I change the slider, the brightness is always at maximum. My laptop is using NVIDIA Optimus and has a integrated Intel HD 3000 and a NVIDIA GT540M graphic card. I already installed the newest Bumblebee version but this has also no effect.

Anyone an idea?

Here is the output of lsmod:

Module                  Size  Used by

bbswitch               13396  0 

parport_pc             32866  0 

ppdev                  17113  0 

bnep                   18281  2 

rfcomm                 47604  0 

bluetooth             180104  10 bnep,rfcomm

binfmt_misc            17540  1 

snd_hda_codec_hdmi     32474  1 

snd_hda_codec_realtek   223867  1 

snd_hda_intel          33773  3 

snd_hda_codec         127706  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel

snd_hwdep              13668  1 snd_hda_codec

snd_pcm                97188  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec

arc4                   12529  2 

snd_seq_midi           13324  0 

snd_rawmidi            30748  1 snd_seq_midi

snd_seq_midi_event     14899  1 snd_seq_midi

snd_seq                61896  2 snd_seq_midi,snd_seq_midi_event

ath9k                 132390  0 

snd_timer              29990  2 snd_pcm,snd_seq

snd_seq_device         14540  3 snd_seq_midi,snd_rawmidi,snd_seq

mac80211              506816  1 ath9k

uvcvideo               72627  0 

snd                    78855  16 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device

videodev               98259  1 uvcvideo

soundcore              15091  1 snd

snd_page_alloc         18529  2 snd_hda_intel,snd_pcm

psmouse                87692  0 

joydev                 17693  0 

v4l2_compat_ioctl32    17128  1 videodev

serio_raw              13211  0 

ath9k_common           14053  1 ath9k

ath9k_hw              411112  2 ath9k,ath9k_common

ath                    24067  3 ath9k,ath9k_common,ath9k_hw

cfg80211              205544  3 ath9k,mac80211,ath

i915                  468651  3 

drm_kms_helper         46978  1 i915

drm                   242038  4 i915,drm_kms_helper

mei                    41616  0 

i2c_algo_bit           13423  1 i915

mxm_wmi                12979  0 

acer_wmi               28418  0 

sparse_keymap          13890  1 acer_wmi

video                  19596  1 i915

wmi                    19256  2 mxm_wmi,acer_wmi

mac_hid                13253  0 

lp                     17799  0 

parport                46562  3 parport_pc,ppdev,lp

usbhid                 47199  0 

hid                    99559  1 usbhid

tg3                   152032  0 

sdhci_pci              18826  0 

sdhci                  33205  1 sdhci_pci