Dear all! As you can read from bug 1270579 description <https://bugs.launchpad.net/bugs/1270579>, I created Ubuntu package for saving and restoring backlight (brightness) level on laptops.
This package installs one file - "/etc/init.d/sysvinit-backlight" (sysvinit script <https://bazaar.launchpad.net/~nrbrtx/+junk/sysvinit-backlight/files> ). You can install my package from PPA <https://launchpad.net/~nrbrtx/+archive/ubuntu/sysvinit-backlight> with the commands below: sudo add-apt-repository ppa:nrbrtx/sysvinit-backlight sudo apt-get update sudo apt-get install sysvinit-backlight You can remove it by sudo apt-get purge sysvinit-backlight Please note: if you have installed the previous version of my script, please remove it by sudo rm /etc/rc?.d/?25backlight /etc/init.d/brightness /etc/rc?.d/?25brightness The script functionality is: * save backlight (brightness) levels of all video adapters on reboot and shutdown (runlevel 0 and 6) * load backlight (brightness) levels for all video adapters on boot (runlevel S and 2) * this version supports hybrid graphics The script options are: * sudo service sysvinit-backlight status (show current brightness levels and saved in files values) * sudo service sysvinit-backlight start (set saved level from files) * sudo service sysvinit-backlight stop (save current level to files) Known problems: * brightness resets to maximum on login to MATE session (may be related to https://github.com/mate-desktop/mate-power-manager/issues/76) Changes: I removed all bashisms and made code more clear - thanks to Andreas Mohr (andi). I tested my package on Ubuntu 12.04.5 LTS, 14.04.2 LTS and Ubuntu 14.10. With best regards, Ubuntu user, Norbert. On Sat, Jan 10, 2015 at 9:24 PM, Nrbrtx <nrb...@gmail.com> wrote: > Dear Ubuntu and Debian developers! > > I understand that you are very busy, but laptop users have problems > with saving and restoring display backlight level in Debian and Ubuntu. > > Systemd-based distros (Fedora, OpenSuSe, Arch, Sabayon, Mageia) have this > functionality out the box (they have systemd-backlight@.service > <https://github.com/systemd/systemd/commits/56f64d95763a799ba4475daf44d8e9f72a1bd474/src/backlight/backlight.c>), > but sysvinit and upstart not. > > Here is a list: > > - in Arch backlight brightness load and save are provided by systemd > (see Arch wiki > > <https://wiki.archlinux.org/index.php/backlight#systemd-backlight_service>), > it is in systemd > <https://www.archlinux.org/packages/core/x86_64/systemd/> package. > - in OpenSUSE 13.1, OpenSUSE 13.2, CentOS 7, Fedora 20, Fedora 21, > Mageia 4 - systemd package > <http://pkgs.org/search//usr/lib/systemd/systemd-backlight?type=files> > - Sabayon has /usr/lib/systemd/systemd-backlight service > - ALT Linux p7 has systemd, but does not have /usr/lib/systemd/systemd- > backlight service > - in Debian Jessie > > <https://packages.debian.org/search?suite=jessie&arch=any&mode=path&searchon=contents&keywords=systemd-backlight> > and Debian sid > > <https://packages.debian.org/search?suite=sid&arch=any&mode=path&searchon=contents&keywords=systemd-backlight> > there is /usr/lib/systemd/systemd-backlight service > - in Ubuntu Utopic > > <http://packages.ubuntu.com/search?searchon=contents&keywords=systemd-backlight&mode=filename&suite=utopic&arch=any> > and Ubuntu Vivid > > <http://packages.ubuntu.com/search?searchon=contents&keywords=systemd-backlight&mode=filename&suite=vivid&arch=any> > there is /usr/lib/systemd/systemd-backlight service > > There is no backlight load/save functionality in (neither upstart nor > systemd): > > - Ubuntu Lucid > - Ubuntu Precise > - Ubuntu Trusty > - Debian Wheezy > - Debian Squeeze > > So it seems that modern distros have backlight load/save functionality > via systemd-backlight service > <http://www.freedesktop.org/software/systemd/man/systemd-backli...@.service.html>, > but older systems does not have this functionality at all. > > > This problem is well-described on launchpad (see bug 1270579 > <http://bugs.launchpad.net/bugs/1270579> ) and on > AskUbuntu (see my comment > <http://askubuntu.com/questions/151651/brightness-is-reset-to-maximum-on-every-restart/227553#227553> > on it). Around 160 users are affected. > > Steps to reproduce: > 1. User boots laptop (cold boot, not wake from suspend) > 2. User sets comfortable backlight level > 3. User ends his/her work by shutting down the laptop (not suspend, so > backlight level is not saved) > 4. Go to 1 (another cold boot with resetted backlight level). > > I prepared draft version for saving and restoring display backlight level > on laptops - it is saved on launchpad (upstart_brightness.tar.gz archive > <https://bugs.launchpad.net/ubuntu/+source/sysvinit/+bug/1270579/+attachment/4288756/+files/upstart_brightness.tar.gz> > , see comment #18 on launchpad > <https://bugs.launchpad.net/ubuntu/+source/sysvinit/+bug/1270579/comments/18>) > and may be installed to the system manually with > sudo tar -zxvf upstart_brightness.tar.gz -C / > > My script was tested on Ubuntu 12.04 and Ubuntu 14.04 - see reports on > AskUbuntu > <http://askubuntu.com/questions/151651/brightness-is-reset-to-maximum-on-every-restart/227553#227553>, > Launchpad > <https://bugs.launchpad.net/ubuntu/+source/sysvinit/+bug/1270579/comments/22> > and forum.ubuntu.ru <http://forum.ubuntu.ru/index.php?topic=255145.0;all> > on laptops with discrete, integrated and hybrid graphics card. > > Please reply to this message if you are interested in such init-script. > > Thank you! > > > With best regards, > Debian and Ubuntu user, > Norbert. > > P.S. I found interesting projects for the same purpose - first is named > Light and hosted on GitHub <https://github.com/haikarainen/light> > (previously known as LightScript > <http://haikarainen.dotgeek.org/lightscript/>), second is named Relight > <http://xyne.archlinux.ca/projects/relight/>. But I think that > init-script approach is better. >
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