You can do this from the GUI by choosing preferences -> Video and choosing "xv" or "x11" driver. No need to edit conf files by hand or add aliases.
** Changed in: mplayer (Ubuntu) Importance: Undecided => Low Status: Unconfirmed => Confirmed -- default video output is xmga https://launchpad.net/bugs/65165 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs