I have a new HP laptop. Ubuntu 18.04 installs fine apart from "No WiFi Adaptor found". I have looked at Realtek Semiconductor RTL8723DE Device d723 issue and followed the instructions there ("There is new information on this device"), but get the same error message that others report, namely:
$ sudo dkms install rtl8723de/5.1.1.8_21285.20171026_COEX20170111-1414 Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area... 'make' all KVER=4.15.0-22-generic...(bad exit status: 2) ERROR (dkms apport): binary package for rtl8723de: 5.1.1.8_21285.20171026_COEX20170111-1414 not found Error! Bad return status for module build on kernel: 4.15.0-22-generic (x86_64) Consult /var/lib/dkms/rtl8723de/5.1.1.8_21285.20171026_COEX20170111-1414/build/make.log for more information.
I also tried the second suggestion on that page ("You may use the driver hosted at Larry Finger..."). That all installed, but made no difference to "No Wifi Adaptor found".
Here's what the (groovy!) Ubuntu wireless info script says about my setup: https://paste.ubuntu.com/p/5KNtV5qzzz/
Hoping someone can help.
mokutil --sb-state