I have an Acer Aspire 5830TG laptop dual booting with Windows 7 and Kubuntu 12.04. I was trying to install some packages, and while doing so I got the following error message:
Could not get lock /var/lib/dpkg/lock
I then ran a command to unlock it. My screen blanked out, so I restarted the system using the power button.
When I try to login I get a black screen that looks like a console, and after a second I go back to the login prompt.
I found that
kdm is not installed. I can login through command line by pressing Ctrl+Alt+F3 at the login. Now my problem is how to install
kdm since I cannot connect to wifi or anything.