Hi guys, how about your day out there?
First of all, thank you very much, it is true that Manjaro is a great family
gohlip: I had already read your post before putting the first message, and if I think that the reinstallation of the grub simply it was solved as you say.It is my ignorance what happened (it was the first time I saw this of the efis, uefis although if I had read a lot about them, in fact my pc is a 12 year old Johnnie Walker !!!)
The problem that arose from the beginning is that manjaro (squid) only gave me the option to install the grub on hard disk, not on sda1 (partition efi of 512mb), but in effect it started the installed system since detecting efiboot), it was going to follow your instructions (grub-install), and I think I would have gotten it easily, but in the end my nephew liked elementary or ubuntu and end up installing the two (it will be for when you get tired of one of them when I'll give him a treat)
PD: If I let manjaro do the automatic installation, what I did was a unique partition of 698gb, and that I did not like, and as I say did not go the option of selecting sda1.
Sincerely and wishing you a great day to all, a pleasure to read