LinuxQuestions.org
Support LQ: Use code LQ3 and save $3 on Domain Registration
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Laptop and Netbook
User Name
Password
Linux - Laptop and Netbook Having a problem installing or configuring Linux on your laptop? Need help running Linux on your netbook? This forum is for you. This forum is for any topics relating to Linux and either traditional laptops or netbooks (such as the Asus EEE PC, Everex CloudBook or MSI Wind).

Notices

Reply
 
LinkBack Search this Thread
Old 04-01-2012, 04:38 PM   #1
bakery_lurker
LQ Newbie
 
Registered: Apr 2012
Distribution: Slackware64 13.37
Posts: 3

Rep: Reputation: Disabled
No backlight control on Lenovo Ideapad Z570 linux 2.6.37.6


For the last week or so I have been bashing my brains out against the following problem. I have a new Z570 Lenovo Ideapad running Slackware64 2.6.37.6, the stock kernel. There appears to be no way to modulate the backlight brightness. I apologize in advance if all these settings are a big mess. As a newbie, I am pretty much capable only of acting like a monkey and running commands I find on LQ.

Currently my WM is KDE4. The function keys do work controlling sound, but using them to increase or decrease lcd light presents a notification with a screen icon and an empty slider and does nothing.

acpi_listen reveals that they keys attempt:
video DD02 00000086 00000000
video DD02 00000087 00000000

Simultaneously, the following appears in /var/log/messages:
Apr 1 22:18:14 sprocket logger: ACPI group video / action DD02 is not defined

/proc/acpi/ contains no 'video/' only-
ac_adapter battery button event processor wakeup

Also, the directory-
/sys/class/backlight/ is empty

Quote:
$ xbacklight
No outputs have backlight property
So, it seems there is no device for the acpi controls to send commands to. I read somewhere that if the video/ dir did not exist, running #mdprobe video would make it automagically appear, but this is not the case.

/etc/laptop-mode/conf.d/lcd-brightness.conf

Here are my loaded modules:
Quote:
bash-4.1# lsmod
Module Size Used by
cpufreq_stats 3889 0
snd_seq_dummy 1479 0
snd_seq_oss 30116 0
snd_seq_midi_event 5708 1 snd_seq_oss
snd_seq 52486 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device 5473 3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss 40089 0
snd_mixer_oss 17282 1 snd_pcm_oss
appletalk 27313 0
psnap 2053 1 appletalk
llc 3784 1 psnap
ipv6 275315 26
pcmcia 37397 0
pcmcia_core 12125 1 pcmcia
cpufreq_ondemand 9164 8
acpi_cpufreq 6079 0
freq_table 2435 3 cpufreq_stats,cpufreq_ondemand,acpi_cpufreq
mperf 1195 1 acpi_cpufreq
ppdev 6021 0
lp 9781 0
parport_pc 21214 0
parport 30087 3 ppdev,lp,parport_pc
nvram 5821 0
fan 2506 0
fuse 66651 3
snd_hda_codec_hdmi 22985 1
snd_hda_codec_realtek 293594 1
i915 400238 2
iwlagn 188201 0
snd_hda_intel 21915 5
iwlcore 55893 1 iwlagn
drm_kms_helper 27035 1 i915
snd_hda_codec 71748 3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
joydev 10279 0
snd_hwdep 6254 1 snd_hda_codec
snd_pcm 73762 5 snd_pcm_oss,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
drm 177345 3 i915,drm_kms_helper
mac80211 204017 2 iwlagn,iwlcore
r8169 37529 0
uvcvideo 62696 0
i2c_algo_bit 5055 1 i915
videodev 65968 1 uvcvideo
btusb 11689 0
bluetooth 53772 1 btusb
snd_timer 19671 3 snd_seq,snd_pcm
cfg80211 142106 3 iwlagn,iwlcore,mac80211
psmouse 47222 0
processor 25982 1 acpi_cpufreq
video 11949 1 i915
snd 58334 20 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_codec_hdmi,snd_hda_codec_realte k,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 5681 1 snd
intel_agp 10824 1 i915
mii 3906 1 r8169
snd_page_alloc 7297 2 snd_hda_intel,snd_pcm
v4l1_compat 15658 2 uvcvideo,videodev
intel_gtt 14862 3 i915,intel_agp
shpchp 26821 0
serio_raw 4534 0
evdev 9813 15
sg 26495 0
battery 10535 0
thermal 8082 0
thermal_sys 13862 4 fan,processor,video,thermal
agpgart 28874 3 drm,intel_agp,intel_gtt
output 2020 1 video
ideapad_laptop 4262 0
rtc_cmos 9374 0
rtc_core 14471 1 rtc_cmos
rtc_lib 1978 1 rtc_core
button 5013 1 i915
ac 3249 0
rfkill 16442 3 bluetooth,cfg80211,ideapad_laptop
v4l2_compat_ioctl32 11199 1 videodev
i2c_i801 8230 0
hwmon 1473 1 thermal_sys
i2c_core 19769 6 i915,drm_kms_helper,drm,i2c_algo_bit,videodev,i2c_i801
Thanks in advance!

-Bakery Lurker

Last edited by bakery_lurker; 04-02-2012 at 12:31 AM. Reason: added /var/log/messages details
 
  


Reply

Tags
backlight, laptop, lenovo, slackware 13.37


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lenovo G470 aka LENOVO 20078 (laptop) ; Essential IdeaPad www.rzr.free.fr Linux - Laptop and Netbook 4 06-16-2013 07:52 AM
Lenovo z570 - Wireless connection - chip set Intel 1000 802.11 Deusrex Slackware 4 04-01-2012 03:53 PM
LXer: Lenovo's S10e Linux Ideapad LXer Syndicated Linux News 0 01-27-2009 11:50 PM
Linux on Lenovo IdeaPad U110 echasketch123 Linux - Laptop and Netbook 1 09-19-2008 09:25 AM


All times are GMT -5. The time now is 11:46 AM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration