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Mike
Mike, Mac Medic
Category: Mac
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Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
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Strange entries in /var/log/wifi.log, for example,"

Customer Question

Strange entries in /var/log/wifi.log, for example, " _bsd_80211_event_callback: Failed to get power setting from device : err -3900"
JA: How long has this been going on?
Customer: I have no idea. Just noticed it. Doesn't seem to affect performance. Usually just after a wake from sleep. MacBookPro9,1; El Capitan OS X 10.11.6 (15G31).
JA: What troubleshooting have you tried?
Customer: None; just Googling for guidance at this point.
JA: The Mac expert can solve this for you. Anything else you want him to know before I connect you two?
Customer: I'm a fairly experienced Mac user & know my way around UNIX & the Terminal.
JA: Just to clarify, what's the model of your Mac, and what operating system are you running?
Customer: Like I just told you, Pearl, MacBookPro9,1; El Capitan OS X 10.11.6 (15G31).
Submitted: 1 year ago.
Category: Mac
Customer: replied 1 year ago.
var/log/wifi.log:Aug 15 00:30:05 Khimed2 newsyslog[9763]: logfile turned over
Mon Aug 15 01:47:43.255 <airportd[64]> _bsd_80211_event_callback: Failed to get power setting from device : err -3900
Mon Aug 15 01:47:43.255
Mon Aug 15 01:47:43.267 <airportd[64]> _bsd_80211_event_callback: Failed to get power setting from device : err -3900
Mon Aug 15 01:47:43.267
Mon Aug 15 01:47:43.337 <airportd[64]> _bsd_80211_event_callback: Failed to get power setting from device : err -3900
Mon Aug 15 01:47:43.337
Mon Aug 15 01:47:43.348 <airportd[64]> _bsd_80211_event_callback: Failed to get power setting from device : err -3900
Mon Aug 15 01:47:43.348
Mon Aug 15 01:47:50.089 <kernel> wl0: powerChange: *** BONJOUR/MDNS OFFLOADS ARE NOT RUNNING.
Mon Aug 15 01:57:32.206 <kernel> AirPort_Brcm43xx::platformWoWEnable: WWEN[enable]
Mon Aug 15 01:57:32.206 <kernel> AirPort_Brcm43xx::syncPowerState: WWEN[enabled]
Mon Aug 15 01:57:32.291 <airportd[64]> _bsd_80211_event_callback: Failed to get power setting from device : err -3900
Mon Aug 15 01:57:32.291
Mon Aug 15 01:57:35.039 <kernel> AirPort_Brcm43xx::platformWoWEnable: WWEN[disable]
Mon Aug 15 01:57:35.394 <kernel> Unexpected payload found for message 9, dataLen 0
Expert:  comp_audio replied 1 year ago.

Welcome to JustAnswer! My name is ***** ***** I will do my very best to assist you today. Please give me a minute to review your question and get back to you. Thanks for your patience.

Expert:  comp_audio replied 1 year ago.

Please tell me does your MAC go into sleep mode or Hibernate at all? If you do not use either of those then this error will not affect your pc at all.