| What: /sys/devices/platform/samsung/performance_level | |
| Date: January 1, 2010 | |
| KernelVersion: 2.6.33 | |
| Contact: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Description: Some Samsung laptops have different "performance levels" | |
| that are can be modified by a function key, and by this | |
| sysfs file. These values don't always make a whole lot | |
| of sense, but some users like to modify them to keep | |
| their fans quiet at all costs. Reading from this file | |
| will show the current performance level. Writing to the | |
| file can change this value. | |
| Valid options: | |
| "silent" | |
| "normal" | |
| "overclock" | |
| Note that not all laptops support all of these options. | |
| Specifically, not all support the "overclock" option, | |
| and it's still unknown if this value even changes | |
| anything, other than making the user feel a bit better. | |
| What: /sys/devices/platform/samsung/battery_life_extender | |
| Date: December 1, 2011 | |
| KernelVersion: 3.3 | |
| Contact: Corentin Chary <corentin.chary@gmail.com> | |
| Description: Max battery charge level can be modified, battery cycle | |
| life can be extended by reducing the max battery charge | |
| level. | |
| 0 means normal battery mode (100% charge) | |
| 1 means battery life extender mode (80% charge) | |
| What: /sys/devices/platform/samsung/usb_charge | |
| Date: December 1, 2011 | |
| KernelVersion: 3.3 | |
| Contact: Corentin Chary <corentin.chary@gmail.com> | |
| Description: Use your USB ports to charge devices, even | |
| when your laptop is powered off. | |
| 1 means enabled, 0 means disabled. |