Package: xserver-xorg-core-dbg Version: 2:1.7.6-2 Severity: wishlist File: /usr/share/doc/xserver-xorg-core-dbg Do add some instructions to /usr/share/doc/xserver-xorg-core-dbg/ and or $ aptitude show xserver-xorg-core-dbg to tell one how to get started debugging. Or mention /usr/share/doc/xserver-xorg-core/ , which unfortunately isn't any help either. Or /usr/share/doc/xorg-docs-core/ same... $ dlocate -L xorg-docs-core ...