Regarding the "Device Administrator" and how to check if everything
works:

One can do so by using your favorite text editor to open and read these
files:

"/var/log/syslog"
"/var/log/dmesg"
"/var/log/Xorg.0.log"

And, search for "err", "warn", "caut" and "att" to look for errors,
warnings, cautions and attentions, respectfully. Make sure to do the
search without case sensitivity.

You can also open a terminal and do (the "$ " is used just so you know
which lines you must type, it can be ignored when typing):

$ sudo lspci -knn | less

"sudo" will ask for your user's password at first. When typing, it won't
appear at the screen, for safety purposes.

Inside GNU less, use the arrow keys to look for any PCI device that has
no kernel driver or that has "Unassigned" in the name, because these
might be the "bad guys". When done, press Q to close GNU less. If you
want to know the other useful things about GNU less, press H instead of
Q. Be aware that the GNU less search function is case sensitive.

Also, to find any problem with the USB devices, do:

$ sudo lsusb -t | less
$ sudo lsusb | less

You must use both "lsusb" invocations. The first one is used so that you
can see which USB device has a driver in use, those which don't can be
signal of problems (not aways). Then use the second invocation to know
which bus and device refers to which USB, when there is a problem.

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