I’ve made a new installation with calameres (with the erase option). I have two drives HDD + SSD. Manjaro is on the SSD. HDD is just for general data (no Windows or any other OS).
Fortunately I don’t see any problem in Manjaro. But it starts without the boot menu. It shows three times the laptop logo and then I have the login screen.
sudo update-grub but it didn’t help.