Package: linux-image-3.13-1-686-pae Version: 3.13.5-1 when I invoke 'startx' kernel tells 'nvidia: Unknown symbol acpi_os_wait_events_complete (err 0)' I am using Debian GNU/Linux jessie (testing), kernel 3.13-1-686-pae, nvidia-legacy-304xx-driver (304.117-1), xorg (1:7.7+6), xinit (1.3.2-1) and graphic card NVIDIA Corporation NV44A [GeForce 6200]