OK. Launched mplayer from terminal on both Live CD boot (actually from a pendrive) and normal boot from hard drive. Not quite sure if the following is what you are looking for.
terminal output from launching mplayer (Live CD boot):
mint@mint ~ $ mplayer
dvd://EPATIENTMPlayer 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing
dvd://EPATIENT.
The hostname option must be an integer: EPATIENT
Struct dvd, field hostname parsing error: EPATIENT
libdvdread: Using libdvdcss version 1.2.10 for DVD access
There are 1 titles on this DVD.
There are 1 angles in this DVD title.
libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient
libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x0000012d
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x000024f8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x00002a55
libdvdread: Elapsed time 0
libdvdread: Found 1 VTS's
libdvdread: Elapsed time 0
audio stream: 0 format: ac3 (5.1) language: en aid: 128.
number of audio channels on disk: 1.
subtitle ( sid ): 0 language: en
subtitle ( sid ): 1 language: es
number of subtitles on disk: 2
Exiting... (End of file)
mint@mint ~ $
Terminal output from mplayer launch (hard drive boot - - what you called "Classic" boot):
errol@errol-Aspire-5820T ~ $ mplayer
dvd://EPATIENTmplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
The hostname option must be an integer: EPATIENT
Struct dvd, field hostname parsing error: EPATIENT
libdvdread: Using libdvdcss version 1.2.10 for DVD access
libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient
libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x0000012d
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x000024f8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x00002a55
libdvdread: Elapsed time 0
libdvdread: Found 1 VTS's
libdvdread: Elapsed time 0
errol@errol-Aspire-5820T ~ $