** Problems with wifi, icon for wifi does'nt show and wifi adapter driver doesnt load.
1.- Download rtl8821ce.tar
2.- Decompress (tipically in command line tar -xvvf rtl8821ce.tar
3.- Go to the created folder "cd rtl8821ce"
3.- type 
	sudo make all -j<available_processors>, eg sudo make install -j5 tiícally on a i5
5.- type
	sudo make install
6.- type
	sudo modprobe -a 8821ce
7.- restart


** Problems with wifi, tipically machine freezing at startup before/after ubuntu logo and tipically when wifi is loaded and use.

1. Show the menu for "advanced" in the grub menu at startup
	grep submenu /boot/grub/grub.cfg
   This will show you the option "advanced..." that is listed in the main menu of grub (tipically second option in the menu).
   Copy all that is after 'submenu' not includiing "'" it is something that start with "Advanced option..."
2. View the file /boot/grub/grub.cfg (here resides all the option for grub menu)
	All kernels avaiable in your machine will start with a "menuentry" key and then the name of the option in the menu after you select advanced options in menu startup grub
	Search for the kernel you want to set as default (between al lines that start with "menuentry"). For this, at the end of the above mentioned menuentry you will find a "$menuentry_id_option" followed by a name (tipically started by gnulinux-...), well, copy that also.
3.- Edit file /etc/default/grub, find GRUB_DEFAULT var definition, replace what is assigned for that variable with (this will tell that at the grub menu select the entry what_you_copy_in_1 which is the menu for entering default kernels, the ">" means something like after enter that menu then select what_you_copy_in_2 which is the option kernel you want to select) so the new assignment will be something like "what_you_copy_in_1>what_you_copy_in_2"
4.- Type in command line
	sudo update_grub
5.- restart
6.- to check if everything went ok, after startup go to command line and type 
	uname -s
	You should see there the new default kernel tipically something like "Linux <name_of_your_machine> <kernel>...."

7.- Last kernel working for my Lenovo Idepada 315-IKB was 6.2.0-33-generic