Enable IOMMU
Most distros use GRUB as a bootloader, but these instructions work as well for sytemd-boot, for an example of systemd-boot, check the Pop!_OS example below (it's basically the same as GRUB really)
Set the parameter respective to your system in the grub config:
| AMD CPU | Intel CPU |
|---|---|
| Kernel auto-detects if IOMMU is enabled in BIOS | intel_iommu=on |
More info: Arch Wiki Enabling IOMMU
Mostly for AMD users, the parameter video=efifb:off can fix issues when returning back to the host, it is recommended that you add it.
Example of an edited grub file
The default path, for distros that aren't listed below, is /etc/default/grub, to update it after you edited the file, run sudo grub-mkconfig or search for your distro specific grub update command
Ubuntu, Linux Mint, or any debian based distro
Run sudo nano /etc/default/grub
Edit the line that starts with GRUB_CMDLINE_LINUX so it ressembles something like this, keeping the previous parameters:
GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on quiet splash"
Update grub with the command sudo update-grub
Arch linux, and most Arch based distros
Run sudo nano /etc/default/grub
Edit the line that starts with GRUB_CMDLINE_LINUX_DEFAULT so it ressembles something like this, keeping any previous parameters if there is any:
GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on"
Update grub with the command sudo grub-mkconfig -o /boot/grub/grub.cfg
Fedora, and Fedora based distros
Run sudo nano /etc/default/grub
Edit the line that starts with GRUB_CMDLINE_LINUX so it ressembles something like this, keeping the previous parameters:
GRUB_CMDLINE_LINUX="resume=/dev/mapper/fedora_localhost--live-swap rd.lvm.lv=fedora_localhost-live/root rd.lvm.lv=fedora_localhost-live/swap intel_iommu=on quiet"
Update grub with the command sudo grub-mkconfig -o /boot/grub/grub.cfg for Fedora 34 and up, sudo grub-mkconfig -o /boot/efi/EFI/fedora/grub.cfg for Fedora 33 and lower
Pop!_OS
Run sudo nano /boot/efi/loader/entries/Pop_OS-current.conf
Edit the line that starts with options so it ressembles something like this, keeping the previous parameters:
options root=UUID=211de945-3abe-4b4e-87f1-4ec1a062d9b6 ro quiet loglevel=0 systemd.show_status=false intel_iommu=on splash
Update grub with the command sudo bootctl update
Manjaro
Avoid using Manjaro, as it has many issues.
Run sudo nano /etc/default/grub
Edit the line that starts with GRUB_CMDLINE_LINUX_DEFAULT so it ressembles something like this, keeping the previous parameters:
GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on quiet apparmor=1 security=apparmor udev.log_priority=3"
Update grub with the command sudo update-grub
OpenSuse
Run sudo nano /etc/default/grub
Edit the line that starts with GRUB_CMDLINE_LINUX_DEFAULT so it ressembles something like this, keeping the previous parameters:
GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on splash=silent resume=/dev/disk/by-uuid/1652c07d-e2ba-4161-af2f-3e874eedfe1a mitigations=auto quiet"
Update grub with the command sudo grub-mkconfig -o /boot/grub/grub.cfg
IMPORTANT: REBOOT your system to apply the new changes.