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Thread: Black screen after entering encryption key on Kubuntu 12.04

  1. #1
    Join Date
    Apr 2012

    Black screen after entering encryption key on Kubuntu 12.04

    Yesterday I installed Kubuntu 12.04 with full disk encryption using the alternate install cd. After it installed/rebooted, I entered my encryption key, logged in, configured the system settings(but not anything which is remotely related to encryption or the login screen), unpacked the b43 wireless drivers into /lib/firmware, did a "sudo modprobe b43", and installed the following software using apt-get:


    After installing that software, I rebooted my computer, entered my encryption key, and was greeted by a black screen (instead of the login screen). I figured it was busy unencrypting/loading stuff so I let it sit for about 20 minutes while I made myself something to eat. When I came back, I found it was still at the black screen. I tried hitting ctrl-alt-f1 to get to a shell but it didn't work. Eventually I hit ctrl-alt-del which caused the Kubuntu gear to get displayed for a second or two before the computer rebooted.

    What could be causing this black screen and how can I avoid this issue when I reinstall Kubuntu again? Please note that I want full disk encryption (not just the home folder).

    Also, it may be worth mentioning that before this installation, I was running Kubuntu 12.04 with home folder encryption (installed from the live-cd) and it ran just fine (other than some minor issues which aren't relevant to this thread). Before reinstalling I ran Darik's Boot & Nuke to erase the contents of my hard drive.

    Just for extra clarification:
    1. Boot OS
    2. Enter encryption key
    3. Enter account username/password
    4. You are now logged in

    My problem appears to take place between steps 2 and 3.

    Also, if it helps, I am using a Dell Latitude D620 Laptop.
    I would be happy to provide any additional information you might find useful.
    Last edited by Kalantir; August 2nd, 2012 at 12:08 AM. Reason: Added additional information

  2. #2
    Join Date
    Feb 2010
    Round Rock
    Ubuntu 9.10 Karmic Koala

    Re: Black screen after entering encryption key on Kubuntu 12.04

    Have you figured this out yet?

    I am seeing the exact same issue and am getting a little sick of rebooting until it works.


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