sh-3.2# cat /sys/kernel/debug/suspend_stats
success: 3874
fail: 2345
failed_freeze: 2332
failed_prepare: 0
failed_suspend: 11
failed_suspend_late: 0
failed_suspend_noirq: 0
failed_resume: 0
failed_resume_early: 0
failed_resume_noirq: 0
failures:
  last_failed_dev:      alarm
                        alarm
  last_failed_errno:    -16
                        -16
  last_failed_step:     freeze
                        freeze