edit: If you live in Chicago / Indianapolis area, I'd like if you can post your gps.conf file located in /etc/ or /system/etc/
I am having GPS lock issues on NON-KNOX ROM's both Stock 4.3 and SlimRom 7.8 (4.4.4). I am on MK3 baseband, with a non-knox bootloader, and it really doesnt seem like a hardware issue since I know it used to work fine back 4 months ago, and I used to get instant locks on 4.2.
I know the antenna's are not being really affected as I have cleaned up all contacts on the motherboard. I have an external antenna hooked up to the wifi and GPS antenna contact points. And wifi is strong, but no locks on GPS. 18 in view, 0 to 3 fixed, but none lock. Obviously I am outside.
I have already followed these links, which most threads go to. SO I am thinking its some config.
Also yes, I have cleared AGPS data, and reset via GPS Status.apk on both Stock and AOSP.