Hello, I have this exact same problem with the SystemUI crash loop and also System Process crash loop after adjusting my DPI. My question is how did you get into recover/download mode to re-flash if the power button is unresponsive?
I saw that you let the battery die, but I'm worried the power button will still be unresponsive. I also want to make sure I have enough battery juice so that it doesn't die and brick during re-flash. Please help!
I rooted the sm-t700 with the All-In-One CF-auto-root-twrp, and then changed the resolution and pixel density with Resolution Changer.
Once I get the tablet out of UI loop/bootloop I will try the xmodule AppSettings.
EDIT:
If I hold the download buttons down during the bootloop, I am able to boot into download mode. However, connecting the phone USB to my computer I keep getting "USB connection failed." I also never made a nandroid img for twrp.
Simply changing dpi overall in TW rom will generate a boot loop. First of all it needs to be deodexed (manually or use erobot/iron/power rom)..Then use arter concurrent sdk21 v75 xposed (PRESUMING YOU ARE ON 5.0.2 latest LL stock or trying to use it)...
if you never made a nandroid you may have to just Odin flash again...but will need to charge it back just connect to charger when off let it sit there for a long time...don't keep pressing power home etc buttons in the hope of taking it to download Mode to flash if the battery has essentially discharged itself in all your attempts. I am running power rom currently where I used app settings and changed dpi individually on systemui, settings etc.
xposed framework (need to be rooted also of course, flashed through custom recovery like twrp)
xposed-v75-sdk21-arm-arter97-exynos_requestConcurrentGC.zip
from
http://xdaforums.com/xposed/unofficial-xposed-samsung-lollipop-t3113463
and the installer apk
XposedInstaller_3.0_alpha4.apk
from
http://xdaforums.com/showthread.php?t=3034811
Appsettings module from
http://repo.xposed.info/module/de.robv.android.xposed.mods.appsettings
you have to install apk and module not open preferably, go to recovery install the zip then reboot come back and open apk, and check the module, then go about the process of changing dpi selectively
but before all that you need to get back to a charged (sufficiently) device, go back to download, (install samsung drivers if missing on laptop...in odin you will see the box light up to yellow indicating a connection (don't worry about driver not installed successfully message on laptop) usually like in odin 1.85 which i have used works very well for T235, T705, I527 so multiple samsung devices), then odin flash the rom, then install twrp, then root
for root use this chainfire's latest worked for T705, T235 (even though that is 5.1.1) (if twrp prompts to install SU/root..do NOT select that)
NOTE if Cf autoroot worked then just stick with that
http://xdaforums.com/showpost.php?p=64161125&postcount=3
Sent from my SM-T705 using XDA Free mobile app