I fixed this issue myself as of today and its very quite simple. The issue lies in Gear VR Services, it was using 110% of my battery and was draining ram.
First, wipe your cache partition.
Then use "Package Disabler Pro" from google play, it costs only $3.49 and is worth it, especially since you won't have to root your device.
Grant the app admin permissions when prompted. Check the checkbox for Gear VR Services, and done. You just saved your battery and saved your phone's performance. The app will vanish from your app list and will only be visible in the package Disabler app...
This an issue with the Samsung version of the Oreo OS for galaxy s7 edge and needs to be repaired by the Samsung developers.
Hey, If the following steps on the thread don't resolve the batter issue, I would recommend having a Samsung technician look at it.
I don't believe I saw it anywhere. One of the technicians finally admitted it to me on my phone call when I was making arrangements to ship my phone into the repair facility in Plano, TX.
Hope that helps.
Same problem with my S7 Edge. I could go two days without charging, after the OS update I have to recharge 2x per day at a minimum.
Cleared the app cache, too soon to tell if this resolved the issue. Will try Safe Mode tomorrow while at work and start going throug some of the other "solutions" or troubleshooting steps. My wife's S7 Edge is doing the same thing after the update, so it's not just my phone or the battery.
This type of issue will need to be addressed by having the unit serviced if troubleshooting has failed. You can use the following link to find a list of service centers near you that can do the repair: http://www.samsung.com/us/support/service/location.
I have wasted last few minutes reading through this forum and found it amusing how useless and careless Samsung responses are regarding this matter. Most people (if not all) buying an S7 Edge have high IQs as they need to earn quite a bit to be able to buy this phone. Treating them like 5 years old is disrespectful, to say the least.
Like others, my 4 (four!!) Samsung S7 EDGE in my family are now broken after the update. I am ready to throw these and buy all 4 iPhones.