Version: unspecified (using KDE 4.6.2) OS: Linux Some laptops, such as my Lenovo IdeaPad Z360 uses a different way to adjust backlight using the /sys/class/backlight/intel_backlight interface, with its own kernel module. See: https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight This new interface is already supported by gnome-power-manager, hence works well in GNOME. However Solid/PowerDevil doesn't support it as of KDE SC 4.6.2, so controlling screen brightness using battery applet doesn't work. Even in KDE, it is still possible to control screen backlight via console/script etc. for example: echo 390 | sudo tee /sys/class/backlight/intel_backlight/brightness Solid/PowerDevil should be updated to support this. Reproducible: Always Steps to Reproduce: Use the affected laptops. Change brightness via Fn keys or battery applet. Actual Results: No effect. Expected Results: Brightness changes.
Git commit 63d38bdb6a98e3e74b24c2cd88233b7d24a2900f by Alex Fiestas. Committed on 30/09/2011 at 23:32. Pushed by afiestas into branch 'master'. Added intel_backlight and radeon_bl, and priority changed Apart from adding two new needed modules, I have modified the priority of the modules prioritizing the GPU drivers, that's because they usually know better the steps than the "laptop model" one. CCMAIL: lukas@kde.org BUG: 271467 BUG: 265291 M +5 -5 powerdevil/daemon/backends/upower/backlighthelper.cpp http://commits.kde.org/kde-workspace/63d38bdb6a98e3e74b24c2cd88233b7d24a2900f
Git commit 5dc645016aa8aaa5ed3b5fde2a5d53405e3ce714 by Alex Fiestas. Committed on 30/09/2011 at 23:32. Pushed by afiestas into branch 'KDE/4.7'. Added intel_backlight and radeon_bl, and priority changed Apart from adding two new needed modules, I have modified the priority of the modules prioritizing the GPU drivers, that's because they usually know better the steps than the "laptop model" one. CCMAIL: lukas@kde.org BUG: 271467 BUG: 265291 (cherry picked from commit 63d38bdb6a98e3e74b24c2cd88233b7d24a2900f) M +5 -5 powerdevil/daemon/backends/upower/backlighthelper.cpp http://commits.kde.org/kde-workspace/5dc645016aa8aaa5ed3b5fde2a5d53405e3ce714