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ideapad-hacks

Yoga 920 fn-lock and conservation mode acpi platform driver. Actually it should be work on next models: Yoga 700, Yoga 710, Yoga 720, Yoga 900, Yoga 910, Yoga 920, but this information needs confirmation. Please NOTE: this code provided as is. You have to use it at your own risk.

Building

  1. Be sure actual kernel headers installed
  2. Clone repo, change directory and type make

Running

  1. sudo insmod ideapad-hacks.ko
  2. sudo find /sys -name "fn_lock"
  3. In my case find says /sys/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock
  4. Check current fn_lock value: sudo cat /sys/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock
  5. Write new setting sudo echo 0 > /sys/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/fn_lock