What is dkms

What is DKMS?

Dynamic Kernel Module Support (DKMS) is a framework for Linux systems that automatically maintains kernel modules throughout the lifecycle of your system. When you update your Linux kernel, drivers and other kernel modules often become incompatible because they were compiled for the previous kernel version. DKMS solves this by automatically recompiling and reinstalling these modules whenever necessary.

How DKMS Works

DKMS operates by storing the source code of kernel modules in the /usr/src/ directory. When a kernel update is detected, DKMS triggers the recompilation of all registered modules against the new kernel version. This happens automatically, either during installation or through system services, ensuring your hardware drivers remain functional without manual intervention.

Common Uses

DKMS is particularly valuable for:

• Graphics drivers (NVIDIA, AMD proprietary drivers)
• Network drivers and adapters
• Storage controllers and RAID software
• Virtual machine hypervisor drivers
• Custom or third-party kernel modules

Benefits

The primary advantage of DKMS is reduced system maintenance burden. Without DKMS, after every kernel update, users would need to manually recompile drivers, which could be time-consuming and error-prone. DKMS also prevents driver-related system crashes and ensures consistent hardware functionality across kernel versions. This is especially important for production systems where downtime is costly.

Installation and Management

DKMS is typically installed as a package on Debian/Ubuntu systems via apt and Red Hat systems via yum/dnf. Once installed, individual kernel modules can be registered with DKMS, and the system automatically manages them. System administrators can check the status of DKMS modules using command-line tools like dkms status to verify that all modules are properly maintained.