Hi,
I can't change the brigthness on the screen when I use the Fn option. I can see the control is changing but the brightness stays the same.
I noticed this is a very common problem, but everyone seems to have small different aspects of the issue, so I don't want to try a solution that's not correspondent to me. (I learned that lesson the hard way).
I have a Dell Inspiron 15R (5521) 64bit, Intel Core i5.
Ubuntu 14.04 fresh install.
Here is more info:
Imput:
Output:
Code:
BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=6bcf494c-b966-428b-8b27-3799ada2af74 ro quiet splash vt.handoff=7
Imput:
Code:
lspci -k | grep -iA2 VGA
Output:
Code:
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Subsystem: Dell Device 0597
Kernel driver in use: i915
Imput:
Code:
for interface in /sys/class/backlight/*; do echo -e "\n $interface"; cat $interface/{brightness,max_brightness,actual_brightness}; done
Output:
Code:
/sys/class/backlight/acpi_video0
99
99
99
/sys/class/backlight/intel_backlight
1455
4882
1455
Imput:
Output:
Code:
Module Size Used by
ctr 13049 2
ccm 17773 2
bnep 19624 2
rfcomm 69160 8
snd_hda_codec_hdmi 46207 1
joydev 17381 0
snd_hda_codec_realtek 61438 1
dell_wmi 12761 0
sparse_keymap 13948 1 dell_wmi
rts5139 335409 0
uvcvideo 80885 0
intel_rapl 18773 0
arc4 12608 2
videobuf2_vmalloc 13216 1 uvcvideo
videobuf2_memops 13362 1 videobuf2_vmalloc
videobuf2_core 40664 1 uvcvideo
x86_pkg_temp_thermal 14205 0
iwldvm 232285 0
videodev 134688 2 uvcvideo,videobuf2_core
intel_powerclamp 14705 0
mac80211 626489 1 iwldvm
coretemp 13435 0
kvm_intel 143060 0
kvm 451511 1 kvm_intel
snd_hda_intel 52355 3
btusb 32412 0
crct10dif_pclmul 14289 0
snd_hda_codec 192906 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
iwlwifi 169932 1 iwldvm
crc32_pclmul 13113 0
ghash_clmulni_intel 13259 0
bluetooth 395423 22 bnep,btusb,rfcomm
binfmt_misc 17468 1
snd_hwdep 13602 1 snd_hda_codec
snd_pcm 102099 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
snd_seq_midi 13324 0
snd_seq_midi_event 14899 1 snd_seq_midi
snd_rawmidi 30144 1 snd_seq_midi
cfg80211 484040 3 iwlwifi,mac80211,iwldvm
snd_seq 61560 2 snd_seq_midi_event,snd_seq_midi
mei_me 18627 0
snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 29482 2 snd_pcm,snd_seq
dell_laptop 18168 0
aesni_intel 55624 4
aes_x86_64 17131 1 aesni_intel
wmi 19177 1 dell_wmi
i915 783485 4
lrw 13286 1 aesni_intel
snd 69238 17 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_seq_midi
gf128mul 14951 1 lrw
mei 82274 1 mei_me
glue_helper 13990 1 aesni_intel
drm_kms_helper 52758 1 i915
soundcore 12680 1 snd
ablk_helper 13597 1 aesni_intel
drm 302817 5 i915,drm_kms_helper
cryptd 20359 3 ghash_clmulni_intel,aesni_intel,ablk_helper
i2c_algo_bit 13413 1 i915
dcdbas 14928 1 dell_laptop
lpc_ich 21080 0
psmouse 102222 0
video 19476 1 i915
serio_raw 13462 0
mac_hid 13205 0
parport_pc 32701 0
ppdev 17671 0
lp 17759 0
parport 42348 3 lp,ppdev,parport_pc
hid_generic 12548 0
usbhid 52616 0
hid 106148 2 hid_generic,usbhid
ahci 25819 3
r8169 67581 0
libahci 32168 1 ahci
mii 13934 1 r8169
Imput:
Code:
pastebinit /var/log/Xorg.0.log
Output:
Code:
http://paste.ubuntu.com/7330088/
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