Since I installed Lubuntu 14.04, I just can't seem to get MPlayer to play DVDs like it did on 13.04. I have the ubuntu-restricted-extras package installed from Synaptic, and I installed CSS using the command line. My DVD drive mounts at /dev/sr0, so I switched the preferences to reflect that in MPlayer, but it still won't play DVDs. All the DVDs are region 1 (USA/Canada), and they all played fine before the 14.04 install.

I know that MPlayer can decode them, because I can play the VOB files when viewing the disc in PCManFM. But when I try to play the whole disc in MPlayer (File > Disc > Open DVD with menus), it just does nothing.

Any help would be appreciated.