Last night installed a system windows10 tried, found that the touchpad is really hard to use. The most basic two-finger right-click are engaged in do not come out, the Start menu scrolling direction turned out to be vertical. I do not like, I was still using manjaro it.
But there's no reboot, I noticed a Linux boot option.
I tried all kinds of repair will not work. windows looks like a very high-handed, is really stubborn. Ubuntu ppa in the boot-repair we will not use, I tried several times this is not a problem that is the problem.
Finally rebuilt ESP partition (Empty all contents), and then re-install the livecd grub. (The way to another piece of the disk ESP also grub-installa bit)
can be considered solved. . .
sudo -i
mount /dev/sda2 /mnt
mount /dev/sda1 /mnt/boot/efi
mount /dev/sda3 /mnt/opt
mount /dev/vg01/lv_home /mnt/home
mount -B /sys /mnt/sys
mount -B /dev /mnt/dev
mount -B /proc /mnt/proc
chroot /mnt
grub-install /dev/sda
update-grub
grub-install /dev/sdb