I had a problem with my computer. On the next evening I can continue the tactical mission and end it correctly by defeating all aliens. There is some strange behavior or bug related to music and sound, both are unusable after resuming from suspend until I restart UFO: AI.This is a problem as sounds are important for a few things such as knowing whether an alien is hit.for solution I looked for product marketing video also. So, if there is only one time or two of the time to be used to "save" during a battle and to turn off the computer. The machine is a desktop btw, and OS is Lubuntu 16. Probably depends on the board and / or BIOS too.