I'm making a custom command that launches gnome-terminal as a sort of overlay window near the bottom of the screen, similar to the Tilda terminal. In order to do this, I'm using gnome-terminal's --geometry argument, which uses the X geometry specification.
However, I'm unable to place the left border on the window near the left edge of the screen. When I supply the +XOFF value, it's positioned relative to the right edge of the Unity launcher bar. If I make the +XOFF value negative, it still won't place the left border further to the left. If I use a -XOFF value, the right border of the window is positioned outside the screen instead of putting the left border of the window closer to the left side of the screen.
So here's my question, how can I put the left edge of the window at the left edge of the screen using a shell command? I'm using Ubuntu 11.10 if it's relevant.