Do you happen to have a wacom device? If so, try unplugging it and restarting the X server.
I had the same problem and it was solved when i unplugged the wacom volito usb device. Alternatively you may remove the wacom-related configuration options from xorg.conf. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]