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First Tweaks

Dark Theme

  • Login to Proxmox webUI.
  • Select your user name on the top right
  • Click Color Theme
  • Enjoy your dark theme dark-theme

Remove Enterprise repository

  • Navigate to Node -> Updates -> Repositories
  • Select pve-enterprise (Look on the Components column) This is the repository for Proxmox itself
  • Click Disable remove-enterprise-repo
  • Select enterprise (Look on the Components column) This is the repository for Ceph
  • Click Disable remove-enterprise-repo-ceph

VLAN Aware

You can make Proxmox NIC(s) VLAN Aware.

Navigate under your Node -> System -> Network

  • Select your NIC
  • Click Edit
  • Check VLAN Aware
  • Click OK
  • Click Apply Configuration
  • Click Yes vlan-aware vlan-aware-apply

Enable IOMMU

SSH into the Proxmox Server.

Adjust GRUB

Terminal window
nano /etc/default/grub

  • Edit GRUB_CMDLINE_LINUX_DEFAULT line

    • Intel: GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt"
    • AMD: GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt"

  • Press CTRL + S to save

  • Press CTRL + X to exit etc-grub

  • Update grub

    Terminal window
    update-grub

    Example output:

    Terminal window
    root@pve:~# update-grub
    Generating grub configuration file ...
    Found linux image: /boot/vmlinuz-5.15.74-1-pve
    Found initrd image: /boot/initrd.img-5.15.74-1-pve
    Found memtest86+ image: /boot/memtest86+.bin
    Found memtest86+ multiboot image: /boot/memtest86+_multiboot.bin
    Warning: os-prober will not be executed to detect other bootable partitions.
    Systems on them will not be added to the GRUB boot configuration.
    Check GRUB_DISABLE_OS_PROBER documentation entry.
    Adding boot menu entry for UEFI Firmware Settings ...
    done

Add the required modules

Terminal window
nano /etc/modules

  • Add the following

    Terminal window
    vfio
    vfio_iommu_type1
    vfio_pci
    vfio_virqfd

    etc-modules

  • Press CTRL + S to save

  • Press CTRL + X to exit

  • Update initramfs

    Terminal window
    update-initramfs -u -k all

    Example output:

    Terminal window
    root@pve:~# update-initramfs -u -k all
    update-initramfs: Generating /boot/initrd.img-5.15.74-1-pve
    Running hook script 'zz-proxmox-boot'..
    Re-executing '/etc/kernel/postinst.d/zz-proxmox-boot' in new private mount namespace..
    No /etc/kernel/proxmox-boot-uuids found, skipping ESP sync.

Once you are done with the above, Reboot

Verify that IOMMU is enabled

  • SSH to the server
  • Run the following
Terminal window
dmesg | grep -e DMAR -e IOMMU

Example output:

Terminal window
root@pve:~# dmesg | grep -e DMAR -e IOMMU
[    0.006713] ACPI: DMAR 0x0000000040DD7000 000088 (v02 LENOVO TC-M43   00001180      01000013)
[    0.006749] ACPI: Reserving DMAR table memory at [mem 0x40dd7000-0x40dd7087]
[    0.026685] DMAR: IOMMU enabled
[    0.076308] DMAR: Host address width 39
[    0.076309] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
[    0.076313] DMAR: dmar0: reg_base_addr fed90000 ver 4:0 cap 1c0000c40660462 ecap 29a00f0505e
[    0.076314] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
[    0.076316] DMAR: dmar1: reg_base_addr fed91000 ver 5:0 cap d2008c40660462 ecap f050da
[    0.076319] DMAR: RMRR base: 0x0000004b000000 end: 0x0000004f7fffff
[    0.076321] DMAR-IR: IOAPIC id 2 under DRHD base  0xfed91000 IOMMU 1
[    0.076322] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
[    0.076322] DMAR-IR: Queued invalidation will be enabled to support x2apic and Intr-remapping.
[    0.077930] DMAR-IR: Enabled IRQ remapping in x2apic mode
[    0.261416] pci 0000:00:02.0: DMAR: Skip IOMMU disabling for graphics
[    0.328045] DMAR: No ATSR found
[    0.328045] DMAR: No SATC found
[    0.328046] DMAR: IOMMU feature fl1gp_support inconsistent
[    0.328047] DMAR: IOMMU feature pgsel_inv inconsistent
[    0.328048] DMAR: IOMMU feature nwfs inconsistent
[    0.328048] DMAR: IOMMU feature dit inconsistent
[    0.328048] DMAR: IOMMU feature sc_support inconsistent
[    0.328049] DMAR: IOMMU feature dev_iotlb_support inconsistent
[    0.328049] DMAR: dmar0: Using Queued invalidation
[    0.328052] DMAR: dmar1: Using Queued invalidation
[    0.328913] DMAR: Intel(R) Virtualization Technology for Directed I/O

You want to see DMAR: IOMMU enabled.