Hi, i have some problems with brightness. Buttons are work , but nothing change. I tried to add “acpi_backlight=vendor acpi_osi=Linux” at grub cmd line , but it had ho effect.
What openSUSE version, and KDE or Gnome? Information as to what grapics card/chip, and name of graphics driver in use, would also be helpful.
What circumstances tell you that the buttons are working?
opensuse 12.2 , KDE4 version 4.8.5 , NVIDIA GeForce GT 330M with nouveau driver. When i press FN + britness buttons - britness scale appears.
Assuming you haven’t tried the command line with xbacklight, enter it in Konsole as your normal user and tell us what it reports.
Output: No outputs have backlights property
That’s a pity if it reported the backlight setting, you could at least control it using that command and its options.
Have you anything in /sys/class/backlight/acpi_video0 directory? As well as directories, there could be some files with brightness as part of their names.
Also, look to see if you have a “video” module loaded. You can display all modules with command: lsmod
IIRC this command might save the searching: lsmod | grep video
If you have it loaded, the right-hand column should show what other driver module is using it. Report back on what you find.
I don’t have such file or directory, ls /sys/class/backlight shows only nv_backlight and toshiba soft links.
lsmod outputed that: uvcvideo, videobuf2_vmalloc, nouveau, video processor.
In my opinion, You should install the proprietary driver (via repository or via “the hard way”).
Then add the following string to the device section of your xorg.conf file (or similar file in the /etc/X11/xorg.conf.d directory):
Option “RegistryDwords” “EnableBrightnessControl=1”
I don’t have Nvidia or graphics driver here, so I can’t be sure if that’s normal for a working setup. Googling the problem did reveal another with your laptop and the problem (different distro) but no solution, just users scratching around those directories without much to go on.
BTW, its better if you post the results of that lsmod output (the relevant bit) directly by copying from the terminal and pasting it between code tags in the post editor (select the ouput and click on “#”).
Hopefully someone with Nvidia installed (quite a few on the forum) and working backlight control, will take a look at their loaded video modules and that directory to see what they have to compare with yours.
Also use the forum search facility to see if there are any relevant threads, if you haven’t already. 
I did it , but i cant find xorg.conf
consused:
Module Size Used by
fuse 86852 3
nvidia 11288143 42
af_packet 39358 4
xt_tcpudp 12884 2
xt_pkttype 12504 3
xt_LOG 17471 10
xt_limit 12711 10
rfcomm 72935 8
bnep 19584 2
ip6t_REJECT 12939 3
nf_conntrack_ipv6 14497 3
nf_defrag_ipv6 18107 1 nf_conntrack_ipv6
ip6table_raw 12683 1
ipt_REJECT 12541 3
iptable_raw 12678 1
xt_CT 12717 4
iptable_filter 12810 1
ip6table_mangle 12700 0
nf_conntrack_netbios_ns 12665 0
nf_conntrack_broadcast 12589 1 nf_conntrack_netbios_ns
nf_conntrack_ipv4 15005 3
nf_defrag_ipv4 12729 1 nf_conntrack_ipv4
ip_tables 27239 2 iptable_raw,iptable_filter
xt_conntrack 12760 6
nf_conntrack 97545 6 nf_conntrack_ipv6,xt_CT,nf_conntrack_netbios_ns,nf_conntrack_broadcast,nf_conntrack_ipv4,xt_conntrack
ip6table_filter 12815 1
ip6_tables 27207 3 ip6table_raw,ip6table_mangle,ip6table_filter
x_tables 33967 15 xt_tcpudp,xt_pkttype,xt_LOG,xt_limit,ip6t_REJECT,ip6table_raw,ipt_REJECT,iptable_raw,xt_CT,iptable_filter,ip6table_mangle,ip_tables,xt_conntrack,ip6table_filter,ip6_tables
cpufreq_conservative 13783 0
cpufreq_userspace 13162 0
cpufreq_powersave 12618 0
snd_hda_codec_hdmi 36102 4
snd_hda_codec_realtek 81862 1
snd_hda_intel 33312 2
snd_hda_codec 136135 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13602 1 snd_hda_codec
snd_pcm 109282 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
ir_lirc_codec 13021 0
lirc_dev 19980 1 ir_lirc_codec
uvcvideo 76392 0
videobuf2_core 32851 1 uvcvideo
arc4 12529 2
snd_seq 69746 0
ir_mce_kbd_decoder 13248 0
brcmsmac 568746 0
sdhci_pci 22792 0
snd_timer 29370 2 snd_pcm,snd_seq
ir_sanyo_decoder 12839 0
ir_sony_decoder 12713 0
brcmutil 14755 1 brcmsmac
crc8 12893 1 brcmsmac
cordic 12535 1 brcmsmac
videodev 111306 1 uvcvideo
b43 386979 0
mac80211 555559 2 brcmsmac,b43
cfg80211 208339 3 brcmsmac,b43,mac80211
snd_seq_device 14497 1 snd_seq
ir_jvc_decoder 12751 0
sdhci 38242 1 sdhci_pci
snd 87206 13 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_seq,snd_timer,snd_seq_device
ir_rc6_decoder 12874 0
ir_rc5_decoder 12710 0
ssb 66990 1 b43
pcmcia 65856 2 b43,ssb
pcmcia_core 27629 1 pcmcia
ir_nec_decoder 12915 0
rc_rc6_mce 12502 0
ene_ir 29014 0
btusb 23835 0
bluetooth 321927 24 rfcomm,bnep,btusb
iTCO_wdt 17948 0
bcma 35637 2 brcmsmac,b43
toshiba_acpi 22675 0
mmc_core 117686 4 sdhci_pci,b43,sdhci,ssb
sg 36394 0
r8169 61164 0
mei 80083 0
videobuf2_vmalloc 13020 1 uvcvideo
sr_mod 22295 0
iTCO_vendor_support 13718 1 iTCO_wdt
sparse_keymap 13890 1 toshiba_acpi
intel_ips 18453 0
wmi 19070 1 toshiba_acpi
jmb38x_ms 18663 0
memstick 16796 1 jmb38x_ms
acpi_cpufreq 18857 1
cdrom 46687 1 sr_mod
mperf 12667 1 acpi_cpufreq
coretemp 13444 0
i2c_i801 17779 0
rc_core 31880 11 ir_lirc_codec,ir_mce_kbd_decoder,ir_sanyo_decoder,ir_sony_decoder,ir_jvc_decoder,ir_rc6_decoder,ir_rc5_decoder,ir_nec_decoder,rc_rc6_mce,ene_ir
rfkill 26009 5 cfg80211,bluetooth,toshiba_acpi
videobuf2_memops 13608 1 videobuf2_vmalloc
soundcore 15047 1 snd
snd_page_alloc 18484 2 snd_hda_intel,snd_pcm
joydev 17457 0
pcspkr 12718 0
crc32c_intel 12901 0
toshiba_bluetooth 12807 0
battery 18691 0
video 19345 0
button 13906 0
ac 13097 0
microcode 35772 0
autofs4 42753 2
processor 44907 1 acpi_cpufreq
thermal_sys 24703 2 video,processor
scsi_dh_alua 17121 0
scsi_dh_rdac 17408 0
scsi_dh_hp_sw 12894 0
scsi_dh_emc 17258 0
scsi_dh 14554 4 scsi_dh_alua,scsi_dh_rdac,scsi_dh_hp_sw,scsi_dh_emc
Thanks. There won’t be an xorg.conf file by default.
You are looking for the file /etc/X11/xorg.conf.d/50-device.conf in which to place that Option line. It probably needs the driver statement specifying the correct driver’s name before it.
Could you show me an example, i cant understand what means “driver statement”
Your 50-device.conf file by default contains this:
#Section "Device"
# Identifier "Default Device"
#
# #Driver "radeon"
#
# ## Required magic for radeon/radeonhd drivers; output name
# ## (here: "DVI-0") can be figured out via 'xrandr -q'
# #Option "monitor-DVI-0" "Default Monitor"
#
#EndSection
The “#” at the start of each line makes it a comment. You see the line with “# #Driver “radeon”” ? That’s a commented-out Driver statement.
The line with “# #Option “monitor-DVI-0” “Default Monitor””? Yes, now you see that is an inactive Option statement, such as the one you were given earlier.
So, you can either uncomment and update the relative statements in place, or leave them as is and add a new section after all the comments, e.g.
Section "Device"
Identifier "Default Device"
Driver "*yourdrivername*"
Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection
Before editing the file, save a copy in your home dir. If you make a mess of the edit or it doesn’t work, then you can just overwrite it with that copy.
Those lines need to be active (uncommented). That should be enough but I cannot be sure as I don’t have Nvidia. As suggested by @PiElle, it’s the driver name of the proprietary driver, to be inserted between the quotes in the Driver statement.
Once you have saved the edited .conf file, reboot as normal. Let us know how it goes.
Thanks for your help. New driver was installed and ,conf file modified like this:
Section "Device"
Identifier "Default Device"
Driver "*nvidia*"
Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection
Reboot and nothing changed except brightness buttons arent work now, no scale appears. All i need is to increase brightness because its too dark by default.
Hello,
I have the exactly opposite problem - the brightness stays at maximum, and there is no way I can change it. The function keys don’t work, and the slider in the power settings don’t work either.
Tried other distros, experimented with many options in /etc/default/grub, tried and openSUSE 12.2 KDE, and after it didn’t work - I decided to try 12.3 - KDE again - mostly because of the so recent kernel and packages. Unfortunately - exactly the same thing.
I’m on Toshiba Satellite P855-108 with i7 processor and NVidia GT 640M video card.