[Kindle Fire HDX 7" & 8.9" Original Android Develop] exokinetic:
Still working my way through the whole thread, but wanted to offer some experience so far, perhaps worthy of logs...

HDX Apollo

Followed the current install instructions EXPLICITLY after a fresh manual method bootloader unlock found here (DO NOT forget to put cuber in your adb folder if you follow that method...)

latest build: lineage-16.0-20210208-UNOFFICIAL-apollo.zip

OpenGApps arm 9 pico

WiFi connection on home network is SOLID.

Turning WiFi on and off works just as one would expect;

Home WiFi SSID is persistently visible, I never end up with the no SSID's visible when it relates to my HOME NETWORK

(I am a pretty conpetent network admin, home WiFi is legit... Gigabit Fiber with fiber to the house itself)

Current components for anyone troubleshooting setups:

Frontier communications hardware, fiber>to the ONT (Optical Network Terminal)>gigabit ethernet (WAN) out

then> gateway router = ASUS RT-N66U -this is also acting as the NAS device with an external HDD plugged in to USB

then>ethernet cable as a backhaul to> WiFi access point #2 = Arris NVG468MQ -bridged access point mode

(pretty competent little router/AP -provided by Frontier)

This Arris AP is the one I have been connected to, and as far as network/ internet connectivity is concerned on this equipment; not one single complaint.

I even get ~100 Megabytes/s doing a speed test between my GalaxyS8+ and the HDX through the same Arris AP

WiFiMan App by Ubiquiti is the nicest WiFi Site Survery/ Channel Scanning/ Speed Testing app I have EVER come across.

-seriously, try it, its the whole reason I bothered to crack this HDX so I could get above android 4 and use this app, LOL

and its totally free with no ads

I plan on doing some WiFi roaming tesing with the HDX tommorow(ish) using that app so I can see which radio the device is connecting through given they ALL have the same SSID (both 2.4 and 5ghz bands on 2x AP's,-4x radios total to choose from, all on statically set NON-OVERLAPPING channels)

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Some Issues I HAVE encountered:

Home Media Server Streaming

VLC player (downloaded from play store) will play HD streams over the home network from UPnP and SMB syle network attached storage devices, but the the video player inside vlc will crashes out every ~9 minutes (it floats, but average 9 minutes) if you press the file to play it will resume right back where you left off faithfully with almost no buffering, so it seems for VLC player, if you hit some limit for dropped packets, the video player fully collapses.

It absolutely seems wifi related, and VLC player just isnt playing nice in the "flaky wifi" environment.

Same behavior on both UPnP and SMB flavors of media sharing (havent tried NFS or FTP yet)

Fortunatly it seems like this is app specific behavior;

If you want to view video content from your home media server with this ROM, I -HIGHLY- recommend:

"FE File Explorer"

I downloaded it on a whim from the play store to see if this was just app specific behavior;

(I know what your thinking, its a file explorer... yea, it also has a video player that just_works)

It works flawlessly.

At about the same frequenecy (~9 mins) the video stream -MIGHT- artifact out as a kind of buffer effect for like 1-2 seconds, most of the time barely perceivable, and a lot of times it just never happens, when on VLC player it would have kicked out video.

I watched the latest Tron: Legacy as a test, and I got through the whole movie without crashing, very enjoyable -minimal buffering effects. (man the screen image on this thing is AWESOME, high end HD movies look epic)

After reading through this thread I noticed another poster mentioning static IP, so I decided to set the connection settings on the HDX to a static IP instead of automatically assigned by DHCP and it absolutely had an effect on FE File Exporer video playback.

No more buffering to speak of after ~4 more hours of random HD movies.

-I will report back after testing VLC player with the static IP address.

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Phone Tethering via WiFi

(FWIW using a GalaxyS8+ which, at least for me, with my S8+, is known to be flaky at BEST as a WiFi hotspot -I constantly have issues maintaining a connection to the thing as a WiFi tether. USB tethering is flawless. WiFi tethering, I can always see the SSID and connect to it, and after I start tethering on the phone and initiate a connection with a client device I will get internet prett quick, then in ~2-5 minutes the client will loose internet, and the only way to get it back is to stop and re-start tethering on the phone)

All that is to say, I am not even sure if I should be blaming the ROM for this, but;

When attempting to connect to my Galaxy S8's WiFi tether, after a fresh boot, I will (almost) always see the SSID, connect to it, and get good internet for some period of time.

At some point it will loose internet access and wont come back, but will remain connected to the SSID

-if I disconnect from the hotspot SSID it will disapear until I reboot (restarting the wifi tether on the S8 doesnt cure it)

-if I turn wifi off and back on again the hotspot SSID will disapear until reboot

(my home network SSID was still visible after the hotspot SSID disapeared thankfully)

And, actually, AT HOME, I have maintained a connection to the S8 hotspot for over an hour without it dropping out by itself.

-but, if I turn the wifi radio off for any reason, even though the hotspot connection had not dropped off by itself, when I turn the radio back on, I wont be able to see the hotspot SSID anymore, and I will have to reboot.

SO.

Long story short:

I only get one good connection attempt to my phones WiFi tether after a reboot, if for any reason the connection completely disconnects, it will loose it forever until the next reboot

(but, my home wifi will still be visible, and connectable, so the wifi drivers are still working for certain kinds of access points, but not others)

(just hit me as I was typing this, but, the HDX has a dual band wifi radio -802.11a/b/g/n, so 2.4ghz and 5ghz radios... and my Galaxy S8 is also spitting out WiFi on both 2.4 and 5ghz radios -there are settings for both bands in the wifi tethering settings pages... there is only one SSID coming from my S8, so its assinging the same SSID to both bands... there may be some shennanigans going on with roaming between the two radios, or SSID resolving between the two radios, etc... brainstorming)

-I have tried a few different settings adjustments to no effect as far as SSID invisibility after the first good connection, but I have not tried static IP address assignment for this yet; WILL REPORT BACK.

AAAAAAAAAAAAAAnd, I tried to use the tethering to my phone while I was out and about on the road today, which became an epic fail.

I could only get an internet connection for like ~30 seconds after a fresh reboot before the connection would timeout/ 404 error and never come back (at home it does this when I am tethering, but it will -almost- always come right back and reconnect then refresh the page/ entry/ whatever was being loaded)

After the connection dropped unsuprisingly a reboot was required to see the hotspot again;

But, another feature of this test that might also apply to previous posts:

When I was looking for my hotspot in the wifi SSID's list...

There was a point when there was legit 100 SSID's in the list, rofl.

I was driving down the road, and it was picking up new SSID's as they came up and it wasn't clearing them from the list as they disapeared behind.

At a certain point it became comical and I gave up rebooting.

Not sure who to blame that on between the ROM, the flaky S8 hotspot, and the astronomically congested wifi environment.

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Google Apps

Full Chrome is almost unusable, seems to require too much on the resource end, same thing for Maps.

Whatever the browser is that is baked into Lineage is what I have been using, and its light enough that it has actually been quite snappy, as a comparison.

Maps Go (a light version of Maps provided by Google for devices with low end hardware -available right from the app store) has actually been working like a champ.

Its the first "Go" branded -lite version app from Google I have tried, but I will likely be testing more on this device.

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So far I am very impressed and quite satisfied with this ROM, and the capability of this 8 year old device;

-If you would like to work on troubleshooting SSID visibility shenanigans when connecting to flaky wifi devices/ in highly congested wifi environments I am totally game, but I havent hit the end of this thread yet so I dont know if you have tapped out on development yet ;)

The fact that a device reboot on the HDX's end will reliably cure the issue leads me to believe something could possibly be done :D

THANK YOU GGOW!

/Exo