AMD Radeon RX 580 - Second Monitor not working

Ok, so I edited Grub in

/etc/default/grub 
GRUB_CMDLINE_LINUX_DEFAULT="quiet apparmor=1 security=apparmor udev.log_priority=3 amdgpu.dc=1"

and

# MODULES
# The following modules are loaded before any boot hooks are
# run.  Advanced users may wish to specify all system modules
# in this array.  For instance:
#     MODULES=(piix ide_disk reiserfs)
MODULES=(amdgpu)

Then successfully regenerated the image with:

sudo mkinitcpio -P

but that didn’t help yet @Olli

:confused: