GRUB configuration for dual booting linux

Support
1

Hi folks,
I’ve installed Manjaro on two separate partitions (/dev/sda2 and /dev/sda3) so I can use NVIDIA driver on the sda3 and the open source driver on sda2.
the problem is that after I used manjaro-chroot to install grub on sda3, the grub boot parameters on the sda2 install got changed and when I select the manjaro on sda2 from the grub menu it boots in blind mode with this message:

error: no suitable video mode found
Booting in blind mode

I can workaround that by editing boot parameters and adding load_video function, but I think there should be a better way so I don’t have to do that every time I want to boot into sda2.

this is the step-by-step procedure I followed for my dual boot:

1- installed Manjaro on /dev/sda2
2- cloned /dev/sda2 to /dev/sda3 using clonezilla
3- used manjaro-chroot -a to change root into sda3 install
4- installed grub using grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=manjaro --recheck
5- updated grub using sudo update-grub

now I can boot into manjaro installed on /dev/sda3 from the grub menu but the original manjaro’s boot parameters seems to be incorrect. thank you all for tolerating my noob question.

2

you have to check under grub
type this command ‘vbeinfo’ to get uingo boot video with grub , it can be less ( coming from motherboard limit )
and see in each file ( e/tc/default/grub ) parameters for GFXMODE

 The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=1920x1080x32 ( before DEFAULT )