Try the readme. It says that you need to enable read access to a /dev entry. Also, your Linux may be handling mice differently. Are you using a touchpad?

Ubuntu? that's a nice OS

The tricky thing is that the mouse devices must be readable by the user that runs the game. There are at least two things that can prevent that. One is insufficient file permissions (which is discussed in the README). The second is the devices being opened in exclusive mode by some other application.

The problem with recent versions of X was that they use the hardware abstract layer (HAL) causing the server to open all available mouse devices exclusively, regardless of whether the server needs or even user their input, and then the game cannot open them anymore.

You can work around this by disabling the HAL in the Xorg configuration, but I wouldn't recommend it unless you are a reasonably sophisticated Linux user and know what you are doing. An incorrect configuration may render your system unusable! At the very least, I recommend backing up your Xorg.conf before messing with it.

To work around the HAL, disable the AutoAddDevices option and manually configure a mouse and a keyboard. For example, in /etc/X11/xorg.conf:

Section "ServerLayout"
    # more stuff here...
        InputDevice    "Keyboard0"       "CoreKeyboard"
        InputDevice    "Mouse0"          "CorePointer"
        Option         "AutoAddDevices"  "false"
EndSection
 
Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbLayout" "us"
    # more options here, if you like
EndSection
 
Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "CorePointer"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/input/mice"
        Option      "ZAxisMapping" "4 5"
    # more options here, if you like
EndSection

Maybe there is a better way to do this in Ubuntu; if there are advanced Ubuntu users reading along, please comment.

Problem is, I'm new to Linux, and it won't let me edit stuff in any of the folders (example: can't even copy over the res directory to /op/World of Goo). How do I change the security settings to stop this OS from blocking me?

GMMan: Nope, just a couple mice. One USB, one PS/2. With two USB mice, same problem.

And I tried what the README said, and Ubuntu just denied me access.

Hmm...I have Ubunto on a Virtual PC...

I never tried anything in that nature, but keep trying!

Any ideas, guys? I'm still slammed against the brick wall of Ubuntu's evil security system...

i never had those problems, cuz i never tried it

NEW SIIIIIIIIIIIIIIIIIIIGGGGGGGGG

That he has a new signature.

Most people like to look at sigs sometimes, ("I'm a banana!", "Tacos rule... oh AND World of goo " and etc.) So I'm pretty sure that your sig wouldn't have gone un-noticed, but people like enthusiasm!

that weird looking thing in your sig is SUSHI (if it isn't .... ITS AN ALIEN!!!)

wait...WHAT!?!

lolwow

My comment is my sig! (right now anyway) (this could change in the future, so if I change my sig, It won't make sense, so don't bother.)

Uh, still no answer for Linux security system?...

got karamac koala and not even wog is running! which one do i download?