My laptop is Acer E-15 E5-575G-76YK
After setting up BOOT password, disabling secure BOOT,
installing Ubuntu 64 bit from USB,
the computer still does not show up
GRUB menu, but
only shows up Windows Boot Manager menu if to
click F12 at boot time.
There were no error warnings after Ubuntu installation.
After installation, I rebooted from USB again and ran
boot-repair. Boot-repair reported an error, but not clear which one.
My SSHD is /dev/sda.
Windows is on sda3
Ubuntu on sda5 and 6.
It was a state of hybernate, but I fixed it by "shutdown /s /t 0".
Boot-repair log is attached.