[T-Mobile Samsung Galaxy S6 Edge] alexdata:
I have this Screen View Mirroring problem too....

First some info about my phone, and how I rooted it,

then the question follows below that...

PHONE INFO:

I have a "Samsung Galaxy S7 Exynos (SM-G930F) "

I have NOT updated the phones software (OTA/ODIN)

Android Version 6.0.1

Baseband Version: G930FXXU1BPJG

BuildNumber: MMB29K.G930FXXU1BPJG

(Android Security Patch Level: 01.NOV.2016)

I have rooted it using "ODIN" with "Samsung USB Drivers"

and "Download Mode" to flash the phone with ROOT...

Flashed it with this file "CF-Auto-Root-herolte-heroltexx-smg930f.zip" (Contains ChainFire Root + TWRP)

Seems to be "TWRP-3.0.2.4-herolte.img" thats installed on my phone now... This could probably (maybe) be changed with the use of the app "TWRP Manager", if needed, to another version of TWRP...

Then I restarted the phone, and booted into recovery (TWRP)

did select WIPE + FORMAT DATA in TWRP.

Then I installed the XPOSED FRAMEWORK using TWRP.

I installed "xposed-v86.0-sdk23-arm64-custom-build-by-wanam-20160709.zip"

All of this works! I get ROOT and I get TWRP, and XPOSED with different modules to work... So far so great...

THE QUESTION:

Then there was the Screen Mirroring part (Smart View/QuickConnect)

This is NOT working at all on my phone, after rooting the phone...

I did the EDIT of the "/SYSTEM/build.prop" file, as suggested above, and added the "wlan.wfd.hdcp=disable" line to the end of that file. Saved "build.prop" and rebooted.

This made my "GRUNDIG TV" (not a samsung tv) connect to the phone, asking for the PIN, and upon entering the PIN, a black screen opened on the middle of the tv screen (where content from the phone would normally be) and only a mouse pointer is visible in the black middle part of the screen (the content space).

I then later tested the same phone (with no new changes) at a friends house, connected it to a 55inch Samsung with a curved display, and there it worked as expected...

Both sound and image was transferred... But at home, only a "black box w/mouse pointer" in the middle of the screen - no image transferred...

PS: WHILE HAVING THAT EDITED LINE AT THE END OF THE "build.prop" FILE...

I also noticed that some pages could not be opened in FIREFOX while having this edited line at the bottom of the "build.prop", and apps like SureSpot and Wickr could not be logged into...

It is as if the mobile networking on my phone was partly working, and partly not....

So I edited the line away, using a #hashta, aka: commented it away, then saved it, and restarted the phone, and could now immediately log into SureSpot/Wickr and open the pages in FireFox that could not be opened before.... (with the line of code active in "build.prop")

So my question is... How can I make this work with my GrundigTV ???

I need ROOT for other fine-grained control of apps and the android system, and I need XPOSED too, to get that fine control...

So my question is:

How can I maintain ROOT and XPOSED (using the method explained above, to root the phone)

and still change around "something" to make Screen Mirroring (Smart View) work with any TV? And not having that fix, create strange problems with app connectivity.....?

PS: I've also updated "QuickConnect" to the version

(v 4.1.8980705.0)

using "Samsung Apps" to update it... As it seems to have something to do with this...