Detected Hardware Unit Hang

Detected Hardware Unit Hang This article aims to help users troubleshoot Detected Hardware Unit Hang errors that usually lead to 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


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


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


Add the following line to the GRUB_CMDLINE_LINUX_DEFAULT value:


It would look like this:


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