How do I add ioapic_ack=new to the Xen boot options in GRUB?

it’s also not already resolved

the solution turns the screen black or wasn’t implemented correctly

this is the solution, the black screen could be a typo

Append this line to the /etc/default/grub in dom0:

GRUB_CMDLINE_XEN_DEFAULT="$GRUB_CMDLINE_XEN_DEFAULT ioapic_ack=new"

And run this command in dom0:

sudo grub2-mkconfig -o /boot/grub2/grub.cfg