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    Kubuntu stopped booting to GUI

    Hello,

    Yesterday I missed to shut down my computer, so it ran out of battery over night. Trying to restart it today resulted that it does not boot to the GUI anymore, but stays in command line mode. Reading many of the existing threads on that topic and trying the solutions provided there didn't help. I have Kubuntu 16.04 LTS installed.

    I would be very glad about any help.

    #2
    When it boots up, does it get to the login screen and can you enter your password?
    If not, are you really in the grub rescue mode?
    Last edited by GreyGeek; May 10, 2018, 01:21 PM.
    "A nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.”
    – John F. Kennedy, February 26, 1962.

    Comment


      #3
      If I boot normally it just gets me to a black screen with a cursor which does not react to any keyboard entry. Pressing ctrl+alt+F1 opens a shell. There it asks me for username & password. In recovery mode I directly get to the shell asking for username & password. Furthermore while booting I get the following notifications:

      „Failed to start Detect the available GPUs and deal with any system changes. See ‚systemctl status gpu-manager.service‘ for details“

      and

      „Failed to start Simple Desktop Manager. See ‚systemctl status sddm.service‘ for details“

      Logging in also works and I can access my files and programs..

      Comment


        #4
        See who owns ~/.Xauthority.
        It should be yourname:yourname.
        "A nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.”
        – John F. Kennedy, February 26, 1962.

        Comment


          #5
          It is me owning that file with -rw———-

          Comment


            #6
            Kubuntu stopped booting to GUI

            When you get the black screen open a terminal and issue
            startkde

            If that does’t work I’d check your install completeness:
            sudo apt -f install
            sudo dpkg —configure -a

            Do that pair repeatedly until both show nothing done

            And if the black screen persists try re-installing plasma-desktop
            Last edited by GreyGeek; May 11, 2018, 04:40 AM.
            "A nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.”
            – John F. Kennedy, February 26, 1962.

            Comment


              #7
              Hello GreyGeek

              When I try
              Code:
              startkde
              the console outputs
              Code:
              $DISPLAY is not set or cannot connect to the X server
              . For
              Code:
              sudo apt -f install
              the system wants to remove the packages
              Code:
              python3-bs4, python3-cycler, python3-pandas, python3-dateutil, python3-html5lib, python3-lxml, python3-tables, python3-numexpr, python3-patsy, python3-pyparsing, python3-tz
              which fails due to a Permission denied message. Performing the suggested command
              Code:
              sudo dpkg —configure -a
              is performed without any message, and also does not change anything about the above behaviour

              Comment


                #8
                Your system isn't healthy until both of those commands can execute sequentially without generating error msgs.
                I'd delete the python packages and repeat the two commands until everything comes back clean. Then we can work from there to get the Desktop GUI running.
                "A nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.”
                – John F. Kennedy, February 26, 1962.

                Comment


                  #9
                  Dear GreyGeek,

                  Thank you very much for your help. After spending another few hours to solve the appearing problems with the Python packages, I decided to take plan B and delete and reinstall my Kubuntu.

                  All the best

                  Comment


                    #10
                    Originally posted by KubuntuPasc View Post
                    Dear GreyGeek,

                    Thank you very much for your help. After spending another few hours to solve the appearing problems with the Python packages, I decided to take plan B and delete and reinstall my Kubuntu.

                    All the best
                    My most recommended step for malfunctions that cannot be easily diagnosed and repaired. My second most recommended step is to use Btrfs as the root file system when installing Kubuntu (or Neon). You can create a daily snapshot in seconds and if disaster strikes it takes less than 5 minutes to roll back to the most recent snapshot. That is a LOT easier than putzing around for hours or days trying to reverse a mistake, accident or other failure mode.
                    "A nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.”
                    – John F. Kennedy, February 26, 1962.

                    Comment


                      #11
                      Hello
                      I have te same Problem since last week.
                      reinstall not work for me since I have 9000 installed Packets and above 20 Apps that working on Handmade Scripts.
                      So reinstalling would take Weeks.
                      apt and dpkg run flawlessly, but I only get a black screen with Cursor.
                      If I run start kde I get the same error.
                      Other DE are working, but only use the US Keyboard layout.
                      Is there a waz to make it work again?
                      For me it is happened after a normal reboot.
                      I am using Kubuntu 16.04 LTS (32Bit)
                      Thanks

                      Comment


                        #12
                        The "$DISPLAY is not set or cannot connect to the X server" error means the xserver isn't running. Try "startx". It may launch the desktop or result in error messages.

                        If it generates errors, look into /var/log/Xorg.0.log and see if it reveals anything.

                        Please Read Me

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