I have a Debian Wheezy 7 installation. When I turn it on it boots to the log in screen normally. However when I type in my username/password and try to login the screen briefly turns off for about one second and returns to the log in screen. I cannot log in.
I have made no changes to the system other than an owner/permissions change I made to the "/tmp" folder. If anyone can help it will be greatly appreciated! Please help.