@SJackson There's a buid of Mobian I think I saw someone working on using halium/hybris. But haven't seen anything about it in a while. There's also Postmarket, but no build for N6P. Those might be better choices for your application.
Hi, Nexus 6P has problems with wifi driver sometimes crashing in the background. Did you try to disable and enable in this indicator? You can see, I have a lot of netowrks in range, and I am connected with my home net 🙂
I did some digging, and turns out that without active mobile network card in the phone, AGPS will use a long time to get a fix.
This is because AGPS use cell tower fix to determine rough location, and then get help from internet to calculate a more accurate position. (Simple explanation, read more here: https://en.wikipedia.org/wiki/Assisted_GPS)
I put my phone card in the Nexus 6P, and even inside it took under 1 min for the unit to have a fix and position.
@flohack I went back and checked adb connection but fastboot devices only shows the phone when it is in recovery. I noticed that when in recovery fastboot devices lists the ser. no. and has unauthorized beside it.
I would recommend to tar up user-data and system-data in recovery, then adb pull that stuff, drop it into the new device and unpack it there (after removing both folders that were there to avoid merges).