Easy slow down manager provides Linux users with functionality similar to "Samsung Easy Speed Up Manager". It also allows to turn WiFi and backlight on and off.

It consist of kernel module named easy_slow_down_manager. To use it first issue "modprobe easy_slow_down_manager". If everything goes fine you get /proc/easy_slow_down_manager, /proc/easy_wifi_kill and /proc/easy_backlight files.

• "echo 0 > /proc/easy_slow_down_manager" turns laptop to "normal" mode.
• "echo 1 > /proc/easy_slow_down_manager" turns laptop to "silent" mode.
• "echo 2 > /proc/easy_slow_down_manager" turns laptop to "speed" mode.
• "echo 0 > /proc/easy_wifi_kill" turns WiFi off.
• "echo 1 > /proc/easy_wifi_kill" turns WiFi on.
• "echo 0 > /proc/easy_backlight" turns backlight off.
• "echo 1 > /proc/easy_backlight" turns backlight on.

Samsung backlight module fixes backlight-related bugs in acpi for Samsung laptops. Important: To enable it, boot kernel with acpi_backlight=vendor option.

The module can work in two modes: direct PCI programming and brighness control via SABI. The mode is chosen by module option use_sabi (could be 0 or 1); by default SABI support is enabled. SABI provides support for larger number of laptop models, but allows for less number of brightness levels.

samsung-backlight module options: debug=(0|1) print debug information use_sabi=(0|1) change brightness via PCI or SABI (default) force=(0|1) skip model/vendor checks sabi_delay=value delay between SABI commands,ms minbright=value maxbright=value specify minimum and maximum brightness levels for PCI interface (non-SABI); default is (10,255); for SABI (0,7) levels=value number of brightness levels for non-SABI mode; default is 7 initbright=value initial brightness level