Also had the kernel panic issue, found the solution here.
Edit: For all the people not that familiar with this stuff:
- Boot a live USB Manjaro (download and “burn” that on any working computer)
- start terminal
- run
sudo -s
to be root - run
manjaro-chroot -a
- edit
/etc/mkinitcpio.conf
as shown in the link - run
mkinitcpio -P
- exit chroot and reboot