# Check 32 MSI

After following the manufacturer’s procedures for unboxing and setting up the AI appliance box, verify that 32 message signaled interrupts (MSI) are enabled in the UEFI/BIOS setup. The QAIC kernel driver for Linux requires 32 MSI for best performance. The QAIC kernel driver supports single MSI configuration, but with reduced performance.

You must enable Intel VT-d or IOMMU features on x86-based host systems in the BIOS to enable the required number of MSIs.

- For host systems using Intel chipsets, ensure that Intel Virtualization (VT-d) is enabled in the BIOS.
- For host systems using AMD chipsets, ensure that the IOMMU feature is enabled in the BIOS.

Do the following to verify that 32 MSI are enabled and supported:

1. Find the device PCIe address.

> 
> 
> lspci | grep Qualcomm
>         Copy to clipboard

2. Inspect MSI capability.

> 
> 
> lspci -vvv -s <device_PCIe_address>
>         Copy to clipboard
3. Look for sections like the following where `Enable+` means MSI is active and `Count=32/32` means 32 interrupts are supported and enabled.

> 
> 
> Capabilities: [50] MSI: Enable+ Count=32/32 Maskable+ 64bit+
>         Copy to clipboard

If 32 MSI aren’t enabled, follow the manufacturer’s procedures for enabling it as this process varies by BIOS vendor.

## Next steps

- [Check Cloud AI accelerator card health and functionality](https://docs.qualcomm.com/doc/80-92111-1/topic/check-card-health.html#check-card-health).
- [Download and install the Cloud AI SDKs](https://docs.qualcomm.com/doc/80-92111-1/topic/references.html#download).
- [Models, workflows, and system management](https://docs.qualcomm.com/doc/80-92111-1/topic/models-and-workflows.html#deploy-models)

Last Published: May 13, 2026

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