Good thinking, 99 ... sweet.
Your inxi output at #10 indicates you are currently on Linux kernel 4.15.0-20
You also said in your first Post that you had run updates, were they successfully completed?
First I'll show you my output from inxi - nz (the z option filters out your MAC addresses, for privacy)
Code:
chris@Tara-Cinnamon-SSD:~$ inxi -nz
Network: Card-1: Realtek RTL8101/2/6E PCIE Fast/Gigabit Ethernet controller
driver: r8169
IF: enp2s0 state: down mac: <filter>
Card-2: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter
driver: ath10k_pci
IF: wlp3s0 state: up mac: <filter>
Card-3: Atheros
IF: null-if-id state: N/A speed: N/A duplex: N/A mac: N/A
I have Realtek on the Ethernet, but Qualcomm on the WiFi. Some of the Realtek
wifi drivers can be problematic, your rtl8723be included, so it seems.
This
may be most easily remedied by a Kernel substitution, as a workaround.
So put on your pith helmet, have your elephant gun handy, and do an exercise for us.
Reboot your computer, and when the grub menu comes up (you will usually have 5 - 10 seconds to choose, 10 in Mint), choose the 2nd entry if it says Advanced Options or Recovery, and enter.
There may be one or more lines there, you can either write them down or take a good phone picture and upload it to us.
I am using 'Tara' 19 and you 'Tessa' 19.1 but they should be similar. I'm off to check something and then I'll add a BTW (by the way) at bottom.
Cheers
Wiz
BTW - so I am currently running kernel 4.15.0-42 , but in that Advanced Options page I also have older entries such as 4.15.0-38 and 4.15.0-39. It is any entries that
do not say "Recovery" that we may focus on.