Comment 12 for bug 390816

I don't know to what extent it relates to this issue, but there is a difference in behavior on my Lucid installation between pressing the suspend-button, and closing the lid (with the system configured to suspend on lid-close).

If I have a second monitor connected and active (configured with something like xrandr --right-of ...) at the same time as the laptop LCD display, then in the first case (button-press), resuming from suspend correctly restores the display on both the LCD and external display. However, in the second case (closing the lid), upon resume, the LCD's resolution is changed to match the (lower-res) external monitor resolution, and the screens become identical clones of each other.