LibDRM is an interface to the Linux Direct Rendering Manager (DRM). LibDRM provides a user-space API for mode setting. cl-drm is a Common Lisp wrapper for librdrm.
cl-drm is being developed primarily in support of ulubis and is therefor feature incomplete. Pull requests adding more of the API are more than welcome.
cl-drm (obiously) requires libdrm. It is likely that libdrm already exists on your Linux installation if it is recent.
CL-USER> (ql:quickload :cl-drm)