I love it!!! A person after my own heart! I actually have an old laptop that I use for just such purposes: tweak it until you break it. It's fun and I've learned a lot, especially what NOT to do!
Hi, Peredur111's wife here, posting as him. I'm about to try the firmware update that worked for Tristan57. He was a bit frightened of breaking something. I, on the other hand, am completely willing to try to break it (because I know whatever I break can be fixed!).
Let's take the easy things first.
It appears that someone, let's blame your hapless husband, tried to create a document in /etc/modprobe.d but forgot to give it a useful name. Let's give it a useful name and then examine it and see if we need it or if we can remove it.
WARNING: All config files need .conf: /etc/modprobe.d/Untitled Document 1, it will be ignored in a future release.
Linux hates spaces in file names. We can get around that with the auto-complete feature. Please type in a terminal:
Press Tab. The remainer should fill in so it looks like:
sudo mv /etc/modprobe.d/Untitled
Then fill in where you want the file moved (mv) to like this:
sudo mv /etc/modprobe.d/Untitled\ Document\ 1
Press Enter. Now we have the needed .conf and a name without spaces. Whew!
sudo mv /etc/modprobe.d/Untitled\ Document\ 1 /etc/modprobe.d/test.conf
Now let's examine its contents:
Is there anything meaningful in there? If not, remove it:
If you are in doubt, post it here and we'll proceed.
sudo rm /etc/modprobe.d/test.conf
Wow! If hat was the easy one, how hard is the hard one?!?
The fact that your wireless card appears and disappears is very serious. It suggests several possibilities:
lspci -nn | grep 0280
NOTHING happens. When I try lspci -nn I see a list of many Intel items
* An ACPI problem in the system. Check:
Try resetting the BIOS to defaults; F9 in some BIOS.
dmesg | grep -i -e error -e warn
* An electrical defect with the wireless card itself. It may be failing.
* A poorly seated wireless card. In many laptops, there is a door on the bottom to access the wireless card. After carefully following all the procedures outlined in the service manual, carefully wiggle the card out and back in, seating it solidly but not forcing it.
We will have no luck enabling a wireless card that's in a coma or deceased.