Feedback on the Dell Precision 7520 - Crane 15 DVT2

Ubuntu on Dell Precision 7520
reports analysis for Ubuntu 16.04 LTS 64-bit
Pre-installed by manufacturer

Certification notes
Updates required
This system requires all available updates to be applied in order to work properly.
BIOS
Dell: 0.3.5 (UEFI)

Intel Intel(R) Core(TM) i5-7440HQ CPU @ 2.80GHz

BUT is a XEON

Right now I can enter WiFi passwords, they can be displayed and re-entered, but in the next display request (whenit failed to connect) the display shows them messed up in a consistent pattern (on some networks). Although the networks are discovered, they cannot be logged into. Ethernet works.