I have a brand new Acer Nitro-AN715-51, which shipped with Windows 10 and - unfortunately - Microsoft Secure Boot.
Installing 18.04 LTS itself off of a USB stick wasn't a problem, but now the computer is telling me that it can't find an adapter for wifi (or Bluetooth, for that matter). Booting into the Windows partition allowed use of the wifi with no trouble, so it's not a hardware issue.
I suspect it may have something to do with 'MOK', which I didn't really know what to do with when I was unexpectedly dropped into it while restarting to finalize the installation (I now have no way of getting back to the blue MOK screen). I have disabled Secure Boot now, but I'm unsure whether it was still on when first installing Ubuntu - could this have had something to do with not managing to install third-party drivers for the wifi?
EDIT:
Output of lspci -knn | grep Net -A3
(copied by hand, because I obviously can't access the internet on the device in question)
09:00.0 Network controller [0280]: Intel Corporation Device [8086:2723] (rev 1a)
Subsystem: Intel Corporation Device [8086:0084]
and of rfkill list
:
0: acer-wireless: Wireless LAN
Soft blocked: no
Hard blocked: no
1: acer-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
I forgot to mention this previously, but my trackpad also doesn't work (have again confirmed it's not a hardware issue via Windows). I assume this is also a driver issue? I also can't seem to get internet when I plug in an ethernet cable, which limits my options for installing things significantly. At this point, I'm actually amazed that the external mouse does work.
EDIT:
I'm on Ubuntu 18.04.4 LTS. uname -a
returns
Linux drubbels 4.15.0-29-generic #31-Ubuntu SMP Tue Jul 17 15:39:52 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
lspci -knn | grep Net -A3; rfkill list
terminal command.