thanks for the reply!
I ran "cat /proc/cmdline" and got the following:
root@pve:~# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.11.22-5-pve root=/dev/mapper/pve-root ro quiet amd_iommu=on iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafb:off video=efifb:off...