Unsigned kernel and Secure Boot











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I have just bought a Lenovo Ideapad 330 and installed 18.04LTS. Turns out, touchpad is not working.



I found a solution for the touchpad here: Lenovo IdeaPad 330 touchpad not working
I then downloaded .deb packages for mainline kernel 4.19 and installed them. Touchpad now working (sort of).



However, I'm concerned about the warnings I got when installing the kernel, about about the kernel being unsigned and thus incompatible with Secure Boot. Also, when installing the package vim-gtk3 I got error messages about shim-signed and grub-efi-amd64-signed.



Is there a way to get rid of these warnings/errors and still have a working touchpad?



And what is this signed/unsigned business about anyway - why are some kernels not signed?










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    up vote
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    down vote

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    I have just bought a Lenovo Ideapad 330 and installed 18.04LTS. Turns out, touchpad is not working.



    I found a solution for the touchpad here: Lenovo IdeaPad 330 touchpad not working
    I then downloaded .deb packages for mainline kernel 4.19 and installed them. Touchpad now working (sort of).



    However, I'm concerned about the warnings I got when installing the kernel, about about the kernel being unsigned and thus incompatible with Secure Boot. Also, when installing the package vim-gtk3 I got error messages about shim-signed and grub-efi-amd64-signed.



    Is there a way to get rid of these warnings/errors and still have a working touchpad?



    And what is this signed/unsigned business about anyway - why are some kernels not signed?










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have just bought a Lenovo Ideapad 330 and installed 18.04LTS. Turns out, touchpad is not working.



      I found a solution for the touchpad here: Lenovo IdeaPad 330 touchpad not working
      I then downloaded .deb packages for mainline kernel 4.19 and installed them. Touchpad now working (sort of).



      However, I'm concerned about the warnings I got when installing the kernel, about about the kernel being unsigned and thus incompatible with Secure Boot. Also, when installing the package vim-gtk3 I got error messages about shim-signed and grub-efi-amd64-signed.



      Is there a way to get rid of these warnings/errors and still have a working touchpad?



      And what is this signed/unsigned business about anyway - why are some kernels not signed?










      share|improve this question













      I have just bought a Lenovo Ideapad 330 and installed 18.04LTS. Turns out, touchpad is not working.



      I found a solution for the touchpad here: Lenovo IdeaPad 330 touchpad not working
      I then downloaded .deb packages for mainline kernel 4.19 and installed them. Touchpad now working (sort of).



      However, I'm concerned about the warnings I got when installing the kernel, about about the kernel being unsigned and thus incompatible with Secure Boot. Also, when installing the package vim-gtk3 I got error messages about shim-signed and grub-efi-amd64-signed.



      Is there a way to get rid of these warnings/errors and still have a working touchpad?



      And what is this signed/unsigned business about anyway - why are some kernels not signed?







      kernel touchpad lenovo grub-efi secure-boot






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      share|improve this question










      asked Nov 27 at 12:55









      DKlaus

      11




      11






















          2 Answers
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          Turn off secure boot in UEFI menu. Every laptop has a different way for doing this, you can find this with a quick google search. This will turn off messages about unsigned kernel and modules.



          It only allows signed software to boot.
          If you are confident of the downloaded
          Kernel turn it off. Or you can sign it yourself and register machine owner key in secureboot database.



          You can read more about Secure Boot here & go here if you want to read about signing kernel and kernel modules.






          share|improve this answer




























            up vote
            0
            down vote













            You probably installed an unsigned kernel, that's why Secure Boot complains on it.



            Mainline kernels are never signed, but Ubuntu kernels are signed.



            You can disable Secure Boot to get rid of those messages.



            The Secure Boot feature is not very useful, especially whan you are using a mainline kernel.






            share|improve this answer





















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              up vote
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              down vote













              Turn off secure boot in UEFI menu. Every laptop has a different way for doing this, you can find this with a quick google search. This will turn off messages about unsigned kernel and modules.



              It only allows signed software to boot.
              If you are confident of the downloaded
              Kernel turn it off. Or you can sign it yourself and register machine owner key in secureboot database.



              You can read more about Secure Boot here & go here if you want to read about signing kernel and kernel modules.






              share|improve this answer

























                up vote
                1
                down vote













                Turn off secure boot in UEFI menu. Every laptop has a different way for doing this, you can find this with a quick google search. This will turn off messages about unsigned kernel and modules.



                It only allows signed software to boot.
                If you are confident of the downloaded
                Kernel turn it off. Or you can sign it yourself and register machine owner key in secureboot database.



                You can read more about Secure Boot here & go here if you want to read about signing kernel and kernel modules.






                share|improve this answer























                  up vote
                  1
                  down vote










                  up vote
                  1
                  down vote









                  Turn off secure boot in UEFI menu. Every laptop has a different way for doing this, you can find this with a quick google search. This will turn off messages about unsigned kernel and modules.



                  It only allows signed software to boot.
                  If you are confident of the downloaded
                  Kernel turn it off. Or you can sign it yourself and register machine owner key in secureboot database.



                  You can read more about Secure Boot here & go here if you want to read about signing kernel and kernel modules.






                  share|improve this answer












                  Turn off secure boot in UEFI menu. Every laptop has a different way for doing this, you can find this with a quick google search. This will turn off messages about unsigned kernel and modules.



                  It only allows signed software to boot.
                  If you are confident of the downloaded
                  Kernel turn it off. Or you can sign it yourself and register machine owner key in secureboot database.



                  You can read more about Secure Boot here & go here if you want to read about signing kernel and kernel modules.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Nov 27 at 14:04









                  harshit

                  599




                  599
























                      up vote
                      0
                      down vote













                      You probably installed an unsigned kernel, that's why Secure Boot complains on it.



                      Mainline kernels are never signed, but Ubuntu kernels are signed.



                      You can disable Secure Boot to get rid of those messages.



                      The Secure Boot feature is not very useful, especially whan you are using a mainline kernel.






                      share|improve this answer

























                        up vote
                        0
                        down vote













                        You probably installed an unsigned kernel, that's why Secure Boot complains on it.



                        Mainline kernels are never signed, but Ubuntu kernels are signed.



                        You can disable Secure Boot to get rid of those messages.



                        The Secure Boot feature is not very useful, especially whan you are using a mainline kernel.






                        share|improve this answer























                          up vote
                          0
                          down vote










                          up vote
                          0
                          down vote









                          You probably installed an unsigned kernel, that's why Secure Boot complains on it.



                          Mainline kernels are never signed, but Ubuntu kernels are signed.



                          You can disable Secure Boot to get rid of those messages.



                          The Secure Boot feature is not very useful, especially whan you are using a mainline kernel.






                          share|improve this answer












                          You probably installed an unsigned kernel, that's why Secure Boot complains on it.



                          Mainline kernels are never signed, but Ubuntu kernels are signed.



                          You can disable Secure Boot to get rid of those messages.



                          The Secure Boot feature is not very useful, especially whan you are using a mainline kernel.







                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered Nov 27 at 13:55









                          Pilot6

                          51.3k15107195




                          51.3k15107195






























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