Hi,
I have been ‘playing’ with grub-customizer … and now after unistall this tool i have realized that i have a mess at the Grub list, all Manjaro kernels and all of the other Debian systems too are displayed at the grub-list. I have been trying to see if there is any information at some place that can help me to find a way of how to eliminate all this entries from the Grub (not from the systems) but …
Thank in advance for any information.
Try something like:
sudo grub-mkconfig -o /boot/grub/grub.cfg
I think it will help you making some cleanup 
No, i did it many 
times, it doesn’t works …
Ouch 
this grub-customizer is really powerfull, maybe there is still runnig some configuration somewhere that i don’t see … 
that’s the case!
You need to follow grub-customizer readme to remove its changes, they will not be reset by uninstalling it…
you will find them here:
/usr/share/doc/grub-customizer/README
or online:
And don’t do this again 
@csteinforth i promise! 
@joekamprad I need to be sure, are you asking for to install again the grub-customizer and then …?
just see that the README only show how to install it manually…
If you where using grub-customizer before you need to reset its settings before uninstalling it to get “pure” grub behavior back…
well, i was asking this because after /usr/share/doc/ there is not a ‘grub-customizer’ file …
/etc/grub.d/backup/RESTORE_INSTRUCTIONS
are there if you have used it…
O’k i found it but i don’t understand …
How to restore this backup
--------------------------
* make sure you have root permissions (`gksu nautilus` or `sudo -s` on command line) otherwise you won't be able to copy the files
* to fix an unbootable configuration, just copy:
* '/etc/grub.d/backup/boot_grub' to '/boot/grub'
* to reset the whole configuration (if it cannot be fixed by using grub customizer), also copy these files:
* '/etc/grub.d/backup/etc_grub_d' to '/etc/grub.d'
* '/etc/grub.d/backup/default_grub' to '/etc/default/grub'
e. g.
sudo cp /etc/grub.d/backup/boot_grub /boot/grub
[root@keos-pc keos]# cp /etc/grub.d/backup/boot_grub /boot/grub
cp: -r not specified; omitting directory '/etc/grub.d/backup/boot_grub'
[root@keos-pc keos]#
Nope! it is greek to me … i think is better to reinstall grub-customizer and changes everything from there and after that remove this infernal toll and never again …
Sorry, try
sudo cp -r /etc/grub.d/backup/boot_grub /boot/grub
Copy directory needs recursive copying, exactly!
No problem, while you was writing … i did it as i mention it before, reinstalled the grub-cust made all the changes i considered … removed the aplication, grub update, means grub-mkconfig -o /boot/grub/grub.cfg reboot, and evething is back to normal.
Thanks everybody 
My strong recommendation now: never again to play with grub-customizer 
Good advice - it can make you go blind!!!
How else can you evolve and learn if you fear your system. break it and learn and build it again, then repeat.
I like to customize my grub 