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What is mdnsd and why is it killing my battery?

Teacher

What is mdnsd and why is it killing my battery?

I have an unrooted LG G3 with whatever Android version that AT&T currently supports. A few days ago I noticed that the battery life was getting worse (I'd get like 6 hours out of normal use, i.e. full day use). I also noticed that under tha battery usage details, mdsnsd is one of the top offenders (along with Screen, Android System, etc). I do not remember seeing this process before, so I'm wondering what it is and how to get rid of it. My Google searches pointed me to the posts that suggest that this process may be caused by a microSD card (I removed it, but it did not help), Firefox bugs (I don't have Firefox on my phone), Flight Aware (or something like this that I don't have installed). Basically, none of the suggestions I saw applied to my phone. I also installed a brand new OEM battery (I purchased one recently), but it is no better than the old one. Is there anything I can do?

 

P.S. I also notice a process with no name that thakes a few battery cycles. Not too many, but I'm wondering why it has no name. Could it be a virus?

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Message 1 of 26
Teacher

Re: What is mdnsd and why is it killing my battery?

I didn't use the nearby friends feature either.

Message 16 of 26
Contributor

Re: What is mdnsd and why is it killing my battery?

It's not a virus dont't worry. In my case the problem was in the last Dropbox app update. If you use it too uninstall it and restart your phone. The problem should be solved. Hope it helped
Message 17 of 26
Contributor

Re: What is mdnsd and why is it killing my battery?

I, too, have experimented with trying to pinpoint the mdnsd issue and have concluded that it's Facebook. If I get rid of the app, the issue resolves. I even downloaded an older version and never had mdnsd trouble. But now that I've updated to the latest version, the evil little devil is back.
Message 18 of 26
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Contributor

Re: What is mdnsd and why is it killing my battery?

I finally figured it out. Mdnsd stopped operating when I put my phone on safe mode; however, you can't access any 3rd part apps on your phone. I took my phone off of safe mode and the Mdnsd came back on. I soon found out that it's linked to the Facebook app!! I deleted my fb app and since then, I haven't had any problems with mdnsd. So I really think that it's linked to Facebook. In fact I almost guarantee that.
Message 19 of 26
Contributor

Re: What is mdnsd and why is it killing my battery?

I really think it's linked to facebook. Once I deleted my fb app and restarted my phone, I had no more trouble out of mdnsd.
Message 20 of 26
Teacher

Re: What is mdnsd and why is it killing my battery?

After I switched to Friendly (it's a Facebook+Messenger app), I no longer have this issue.

Message 21 of 26
Mentor

Re: What is mdnsd and why is it killing my battery?

After the latest Facebook update, this is no longer an issues for me. mdnsd is not listed anymore under battery usage

Message 22 of 26
Contributor

Re: What is mdnsd and why is it killing my battery?

I do not have facebook installed on my note4 BUT I still have mdnsd running in the backgroud.

Message 23 of 26
Contributor

Re: What is mdnsd and why is it killing my battery?

I traced it to Facebook. I'm a communications engineer and proved my point by doing this: logging onto Facebook I did everything but Post or Re-post. No MDNSD app. running on my phone. Post/re-posting activated it (MDNSD) 5 out 5 times. Spent one week on Facebook w/o posting/re-posting and I never showed up again. This was 6-months ago. I have not used Facebook and this app. has not been on my phone since. This is an information gathering app. that, somehow, gets stuck in a loop trying to get your information, and looses it's destination IP address (one or more companies or Government agency tracking what you are saying). Anyway, 6-months not using Facebook. Never returned to my phone. My carrier is AT&T and I have an android phone.
Message 24 of 26

Re: What is mdnsd and why is it killing my battery?

Actually there's still a viable workaround for those unwilling to succumb to the privacy, data & space hungry apps like Facebook & Messenger, umpteenth Google spawns... (specifically to access FB Messages without Messenger): On your mobile browser switch to use "Desktop Mode" & message section will reappear! Then make sure to Allow Notifications for the site; may need to change in Settings/Advanced/Site: Facebook. (Also suggest: get an APK Extractor for backups, to revert from a bad update. The "Lite"  version works w/least permissions. Extract apps & store external, update browser with security fixes, research & try more security/privacy based ones. Uninstall or disable any apps possible, remove permissions of must keep - tho abilities vary by device & provider). 

Message 25 of 26
Contributor

Re: What is mdnsd and why is it killing my battery?

Coming strictly from a layman's perspective, I add my name to the lengthy list of frustrated LG G3 mdnsd daemon sufferers. My only "tech" experience is one college class of Algol coding in 1975.

My approach therefore was more from a desperation approach than knowledge-based action.

First I read the myriad of blogs that left my head reeling.

Background: I uninstalled or disabled every app I knew I would never use, immediately upon getting my phone. I have never used FB and don't fly a drone (yet).

My procedure: I uninstalled Firefox. I checked to make sure my phone was current with updates.

I followed procedures to re-calibrate my battery, 3x. Cleared cached info. No help. Then yesterday I individually enabled each disabled app, took all permissions away, cleared cache and data, and re-disabled. Then I moved my pictures (all197) over to another device. I also checked "restrict apps in background" under battery saver. Rebooted phone and charged to 100% again.

I have no idea which action did the trick; perhaps it was a combination, or even just me believing I could overcome this little monster, but it took my nasty little daemon off my phone (and also the no-name one) and my battery is back to normal. 

Message 26 of 26
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