Indeed:
$ ls -l /usr/X11R6/lib/modules/dri/i915_dri.so No such file or directory $ dpkg -S i915_dri libgl1-mesa-dri: /usr/lib/dri/i915_dri.so
...
Indeed:
$ ls -l /usr/X11R6/ lib/modules/ dri/i915_ dri.so dri/i915_ dri.so
No such file or directory
$ dpkg -S i915_dri
libgl1-mesa-dri: /usr/lib/
...