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# Detected Hardware Unit Hang

Detected Hardware Unit Hang. This article aims to help users troubleshoot Detected Hardware Unit Hang errors that usually lead to a heavy performance impact on client PCs.

This error is most commonly encountered when the server’s NIC is not fully compatible with Linux.

### Example of the error manifestation

### Resolution

![](https://ggcircuit.atlassian.net/wiki/download/attachments/15861591/undefined-Mar-31-2025-01-45-38-7104-AM.png?version=1&modificationDate=1743385561475&cacheVersion=1&api=v2)

You need to add the following to the kernel startup parameters:

```
pcie_asmp=off
```

In Debian this can be done by modifying the following file:

```
/boot/grub/grub.cfg
```

Add the following line to the GRUB_CMDLINE_LINUX_DEFAULT value:

```
pcie_asmp=off
```

It would look like this:

```
GRUB_CMDLINE_LINUX_DEFAULT="pcie_aspm=off"
```

(or have more parameters if there are some parameters in place already)