[Shield Tablet General] Son-j:
I may have discovered a way to make Shield Tablet very smooth and stable very consistently. I don't have the technical backing for it - im just a regular user doing trial and error. I hope it helps the others who want to keep this awesome Device live up to its potential...longer.

So here's my Device setup:

- Shield Tablet US-LTE

- using stock 5.4 debloated for K1 by Sh0X31 for K1 (yes, it works well with my us-lte as long as you don't care about system updates and stylus app)

- rooted via magisk

- Xposed framework

- Nova launcher

Using the ROM as it is significantly improved the performance of the device compared to stock 5.4 for US or RoW LTE. But the sluggish experience Everytime the device wakes up from deep slumber, or connects to WIFI for the first time, is still there. Using Antutu system monitor on the notification panel, I could correlate the sluggish performance with the CPU hitting above 94%. That happens 99% of the time so I suspected that most of the persistent sluggish performance is a CPU issue rather than a RAM issue. So I looked for a way to pinpoint which apps are hogging CPU operations, and hopefully discover what triggers it.

I tried enabling CPU usage in Developer's Options but alas, it could only show com.android.systemui so nothing much can be done from there. I understand this is a bug in Android 7 and it was supposed to be fixed on 7.1 but we all know Shield Tablet is stuck at 7.0 for now.

Next I tried checking out Running Services, still in Developer's Option. So I saw a lot of apps there that seem to be hogging CPU - Malwarebytes, ShareIt, Antutu, Google Services, etc. I uninstalled Malwarebytes and ShareIt but the CPU was still operating at 94% and it takes the device a few seconds to respond to my inputs.

Finally, I noticed these Nvidia-specific processes - these few KBs of operations particularly the ones for OTA upgrade and Media as well as Nvidia -customize (something like that). I forced them to stop and voila! My device CPU suddenly calmed somewhere between 30-50% and as expected, it's operating smoothly and snappily.

When I rebooted, those Nvidia processes naturally became active. I suspect that it's probably part of the device startup process. And as expected as well, whenever they're present the device is expected to go sluggish at some point before its CPU can calm down again.

So now, it's been 2 days and my CPU operates between 18-54% on normal operation, sometimes hitting 80% when I transfer files or play games. But it has NEVER gone sluggish, not even once (waking from deep slumber, connecting to WIFI, etc). I'm very satisfied and back to enjoying my Shield Tablet.

DISCLAIMER: I don't have proof that this is indeed the solution. I can't explain it technically as well. Hoping someone with more knowledge on system process can enlighten us. One thing I'm convinced though is that the sluggishness we all experience comes from NVIDIA-specific processes. I make this inference from my observation that having AOSP ROMs make the device smooth consistently. But I don't like any other custom ROMs coz I need the controller support for the tablet. I hope I make sense and hopefully this could help some Shield Tablet Fans. Sorry for the long write up. :)