Backlight Control for Debian

[nujinini]

Hi!

I execute this command in Fedora, Mint & SUSE and it works in controlling the brightness of the monitor.

jun@debian:~$ xrandr --output LVDS --set BACKLIGHT_CONTROL native
X Error of failed request:  184
  Major opcode of failed request:  155 (RANDR)
  Minor opcode of failed request:  15 ()
  Serial number of failed request:  14
  Current serial number in output stream:  14
jun@debian:~$

I tried in Debian but seems to be having a problem. I hope somebody can tell me what to do please?

I need to know how to adjust brightness in Debian for my eyes sake and for battery saving purposes also.

Thanks in advance!

[nujinini]

Hello Everybody,

Please allow me to make a follow-up regarding my question.

As I posted earlier, xrandr --outputs LVDS --set BACKLIGHT_CONTROL native

Is able to let me control brightness of screen in Fedora 10, openSUSE 11.1 & Mint 7.

I cannot seem to figure out the error report given me in Debian. I'm pretty sure, somebody out there can help me solve this.

Kindest regards to all!

[nujinini]

Hello Everyone,

I have been trying to google and ask around regarding a concern of mine posted in the debian section regarding my backlight brightness control using Hotkeys.

xrandr --LVDS --set BACKLIGHT_CONTROL native

which works in fedora, mint & suse. But not in debian.

Anyway, I noticed that there were some views but I received no comments or suggestions. Now please........It never came into my mind that people in this forums did not want to help. In fact, all the things I have learned about linux is because of the help from everybody here.

I tried to also post in the debian forums but still got no answer. Zero!
I am now prepared to swallow the truth so that I can move on with my linuxian life.

My conclusion is that there is still no solution to this problem known to date, PERIOD!

Can somebody kindly confirm this please?

Thanks a lot!

[oz]

I think you'll find that most people here and on other forums are more than willing to reply if they actually know the answer. On the other hand, most will not reply if they don't know the answer, as it does little good to simply make up an answer. Sometimes, people might not understand the question as worded, but in those cases other users will often reply indicating their confusion so that the original poster can clarify the question.

Try to be more patient and someone will most likely reply if they are able to provide the information that you seek. Also, keep in mind that there is no problem with you bumping your thread back to the top every few days with any additional information that you might have.

[nujinini]

Ok. Thanks Ozar

[nujinini]

Hello Everyone!

I was searching over the internet and found this patch support from Debian regarding my question on Xrandr

#435043 - [patch] support RandR backlight control - Debian Bug report logs

My problem is that I do not know if this is really the answer I am looking for and if it is, I am not very sure how to proceed from here. Thank you very much!

[reed9]

It looks like a bug fix has been implemented in the package hotkeys 0.5.7.4-0.2.

The current version of hotkeys in the Debian stable repos is 0.5.7.4-0.1.

You could try installing the version from testing, or you could try compiling the latest version yourself.
Debian -- Details of package hotkeys in squeeze

I wonder also if you have this package installed at all yet? I assume it would be part of a default debian install, but not really sure. You might also want the hotkey-setup package if you don't already have it.

[nujinini]

Hello reed9,

Its always a joy hearing from you!

Anyway, I tried to install hotkey-setup package and this is what I got:

jun@debian:~$ sudo dpkg -i /home/jun/Desktop/hotkey-setup_0.1-23_i386.deb
[sudo] password for jun:
Selecting previously deselected package hotkey-setup.
(Reading database ... 119308 files and directories currently installed.)
Unpacking hotkey-setup (from .../hotkey-setup_0.1-23_i386.deb) ...
dpkg: dependency problems prevent configuration of hotkey-setup:
 hotkey-setup depends on discover (>= 2.0); however:
  Package discover is not installed.
dpkg: error processing hotkey-setup (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 hotkey-setup

jun@debian:~$ sudo apt-get install discover
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
  discover: Depends: libdiscover2 (= 2.1.2-3) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

jun@debian:~$ sudo apt-get -f install discover
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
  discover: Depends: libdiscover2 (= 2.1.2-3) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

jun@debian:~$ sudo apt-get install libdiscover2
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
  hotkey-setup: Depends: discover (>= 2.0) but it is not going to be installed
  libdiscover2: Depends: discover-data (> 2.2004.04) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

jun@debian:~$ sudo apt-get -f install discover libdiscover2 discover-data
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  discover discover-data libdiscover2
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0B/705kB of archives.
After this operation, 3842kB of additional disk space will be used.
Media change: please insert the disc labeled
 'Debian GNU/Linux 5.0.2 _Lenny_ - Official i386 kde-CD Binary-1 20090628-15:49'
in the drive '/cdrom/' and press enter

Preconfiguring packages ...
Selecting previously deselected package discover-data.
(Reading database ... 119338 files and directories currently installed.)
Unpacking discover-data (from .../discover-data_2.2008.06.25_all.deb) ...
Selecting previously deselected package libdiscover2.
Unpacking libdiscover2 (from .../libdiscover2_2.1.2-3_i386.deb) ...
Selecting previously deselected package discover.
Unpacking discover (from .../discover_2.1.2-3_i386.deb) ...
Processing triggers for man-db ...
Setting up discover-data (2.2008.06.25) ...
Setting up libdiscover2 (2.1.2-3) ...
Setting up discover (2.1.2-3) ...
Setting up hotkey-setup (0.1-23) ...
 Removing any system startup links for /etc/init.d/hotkey-setup ...
jun@debian:~$

From my end it seems I was able to install but the hotkeys are not responding still.

[reed9]

It's a mystery to me how you always manage to have strange dependency problems in Debian. All of those packages it claimed were not going to be installed are quite clearly in the repos. What is you /etc/apt/sources.list looking like these days?

Try this

su -
apt-get install xblacklight
exit
xbacklight -dec 10%

[nujinini]

  GNU nano 2.0.7          File: /etc/apt/sources.list

#
# deb cdrom:[Debian GNU/Linux 5.0.2 _Lenny_ - Official i386 kde-CD Binary-1 200$

deb cdrom:[Debian GNU/Linux 5.0.2 _Lenny_ - Official i386 kde-CD Binary-1 20090$

deb http://mirrors.kernel.org/debian/ lenny main
deb-src http://mirrors.kernel.org/debian/ lenny main

deb http://security.debian.org/ lenny/updates main
deb-src http://security.debian.org/ lenny/updates main

deb http://volatile.debian.org/debian-volatile lenny/volatile main
deb-src http://volatile.debian.org/debian-volatile lenny/volatile main

deb http://download.virtualbox.org/virtualbox/debian lenny non-free

deb http://www.backports.org/debian lenny-backports main contrib non-free



^G Get Help  ^O WriteOut  ^R Read File ^Y Prev Page ^K Cut Text  ^C Cur Pos
^X Exit      ^J Justify   ^W Where Is  ^V Next Page ^U UnCut Text^T To Spell

jun@debian:~$ su -
Password:
debian:~# apt-get install xblacklight
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package xblacklight
debian:~# exit
logout

jun@debian:~$ xbacklight -dec 10%
bash: xbacklight: command not found

jun@debian:~$ su -
Password:
debian:~# apt-get install xbacklight
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  xbacklight
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 7372B of archives.
After this operation, 73.7kB of additional disk space will be used.
Get:1 http://mirrors.kernel.org lenny/main xbacklight 1.1-1 [7372B]
Fetched 7372B in 5s (1345B/s)
Selecting previously deselected package xbacklight.
(Reading database ... 119400 files and directories currently installed.)
Unpacking xbacklight (from .../xbacklight_1.1-1_i386.deb) ...
Processing triggers for man-db ...
Processing triggers for menu ...
Setting up xbacklight (1.1-1) ...
Processing triggers for menu ...

debian:~# exit
logout

jun@debian:~$ xbacklight -dec 10%
No outputs have backlight property
jun@debian:~$

What do you make out of these outputs please?