Пакет kernel-modules-drm-un-def: Информация

The Direct Rendering Infrastructure, also known as the DRI, is a framework
for allowing direct access to graphics hardware in a safe and efficient
manner.  It includes changes to the X server, to several client libraries,
and to the kernel.  The first major use for the DRI is to create fast
OpenGL implementations.

These are modules for your ALT Linux system