Traceback (most recent call last):
  File "/usr/share/checkbox/scripts/sleep_test", line 440, in <module>
    sys.exit(main())
  File "/usr/share/checkbox/scripts/sleep_test", line 419, in main
    suspender.SetWakeTime(options.wake_time)
  File "/usr/share/checkbox/scripts/sleep_test", line 165, in SetWakeTime
    wakealarm_fh = open('/sys/class/rtc/rtc0/wakealarm','w',0)
IOError: [Errno 13] Permission denied: '/sys/class/rtc/rtc0/wakealarm'