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Linux/UNIX/POSIX Shell Script  |  2009-03-27  |  344 b   |  18 lines
  1. #!/bin/sh
  2.  
  3. test -f /usr/share/acpi-support/key-constants || exit 0
  4.  
  5. . /usr/share/acpi-support/power-funcs
  6.  
  7. grep -q off-line /proc/acpi/ac_adapter/*/state
  8.  
  9. if [ $? = 0 ]
  10.         then
  11.     INTERFACE="dc_brightness"
  12. else
  13.     INTERFACE="ac_brightness"
  14. fi
  15.  
  16. BRIGHTNESS=$(( `cat /proc/acpi/pcc/$INTERFACE` + 0 ))
  17. echo $BRIGHTNESS > /proc/acpi/pcc/$INTERFACE
  18.