Comment 14 for bug 1086921

Booting with your 3.7.0-5-generic, lsmod shows that samsung_laptop is running. lsmod output:
Module Size Used by
snd_hda_codec_realtek 63540 1
snd_hda_intel 32761 4
joydev 17098 0
snd_hda_codec 116443 2 snd_hda_codec_realtek,snd_hda_intel
coretemp 13098 0
rfcomm 37421 4
bnep 17737 2
parport_pc 31969 0
bluetooth 183825 10 rfcomm,bnep
snd_hwdep 13273 1 snd_hda_codec
ppdev 12818 0
snd_pcm 80891 2 snd_hda_intel,snd_hda_codec
gpio_ich 13237 0
snd_seq_midi 13133 0
snd_rawmidi 25383 1 snd_seq_midi
arc4 12544 2
ath9k 130503 0
snd_seq_midi_event 14476 1 snd_seq_midi
samsung_laptop 14101 0
snd_seq 51281 2 snd_seq_midi,snd_seq_midi_event
psmouse 75804 0
mac80211 470993 1 ath9k
serio_raw 13032 0
i915 508195 2
uvcvideo 71280 0
snd_timer 24412 2 snd_pcm,snd_seq
microcode 18287 0
snd_seq_device 14138 3 snd_seq_midi,snd_rawmidi,snd_seq
videobuf2_core 34625 1 uvcvideo
ath9k_common 13784 1 ath9k
videodev 95768 2 uvcvideo,videobuf2_core
drm_kms_helper 45273 1 i915
ath9k_hw 393937 2 ath9k,ath9k_common
videobuf2_vmalloc 12757 1 uvcvideo
drm 227450 3 i915,drm_kms_helper
ath 19188 3 ath9k,ath9k_common,ath9k_hw
mac_hid 13038 0
videobuf2_memops 13213 1 videobuf2_vmalloc
snd 62146 17 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
cfg80211 184762 3 ath9k,mac80211,ath
hid_generic 12485 0
soundcore 14600 1 snd
i2c_algo_bit 13198 1 i915
snd_page_alloc 14231 2 snd_hda_intel,snd_pcm
video 18848 2 samsung_laptop,i915
lpc_ich 16926 0
lp 13300 0
parport 40754 3 parport_pc,ppdev,lp
usbhid 41806 0
hid 82179 2 hid_generic,usbhid
sky2 52927 0

output of ls /sys/class/backlight:
intel_backlight samsung

Samsung is now here and Fn keys work. This solved the problem. A million thanks !