Ubuntu 18.04: No USB, WLAN, HDMI after upgrading kernelUbuntu Freezes since kernel 4.8.0-36 when USB wifi drive plugged inOnly one of external monitors works (Lenovo T480 on Ubuntu 18.04)Ubuntu 18.10 with kernel 4.18 stops workingAcer laptop fails to boot with new kernels 5.0.0-23 and 5.0.0-25

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Ubuntu 18.04: No USB, WLAN, HDMI after upgrading kernel


Ubuntu Freezes since kernel 4.8.0-36 when USB wifi drive plugged inOnly one of external monitors works (Lenovo T480 on Ubuntu 18.04)Ubuntu 18.10 with kernel 4.18 stops workingAcer laptop fails to boot with new kernels 5.0.0-23 and 5.0.0-25






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1


















My situation:



I upgraded the firmware of my Lenovo T480 (via Ubuntu's "application store") and everything went fine except that I was running 4.18 kernel before and now it did not boot anymore due to some signature problem (Secure Boot is enabled). No problem, I just selected 4.15 from boot menu and it still worked (why?).



So, I installed the newest 5.0.0. However, after reboot I noticed that USB didn't work, WLAN didn't work and even the external display didn't work anymore. Then I installed 4.17. Same problem. It seems that only the default 4.15 now works.



Any ideas what has happened?



There are no errors when installing the other kernels. It's just after reboot I'm lacking USB, WLAN and HDMI. Otherwise the kernels seem to work.










share|improve this question

































    1


















    My situation:



    I upgraded the firmware of my Lenovo T480 (via Ubuntu's "application store") and everything went fine except that I was running 4.18 kernel before and now it did not boot anymore due to some signature problem (Secure Boot is enabled). No problem, I just selected 4.15 from boot menu and it still worked (why?).



    So, I installed the newest 5.0.0. However, after reboot I noticed that USB didn't work, WLAN didn't work and even the external display didn't work anymore. Then I installed 4.17. Same problem. It seems that only the default 4.15 now works.



    Any ideas what has happened?



    There are no errors when installing the other kernels. It's just after reboot I'm lacking USB, WLAN and HDMI. Otherwise the kernels seem to work.










    share|improve this question





























      1













      1









      1








      My situation:



      I upgraded the firmware of my Lenovo T480 (via Ubuntu's "application store") and everything went fine except that I was running 4.18 kernel before and now it did not boot anymore due to some signature problem (Secure Boot is enabled). No problem, I just selected 4.15 from boot menu and it still worked (why?).



      So, I installed the newest 5.0.0. However, after reboot I noticed that USB didn't work, WLAN didn't work and even the external display didn't work anymore. Then I installed 4.17. Same problem. It seems that only the default 4.15 now works.



      Any ideas what has happened?



      There are no errors when installing the other kernels. It's just after reboot I'm lacking USB, WLAN and HDMI. Otherwise the kernels seem to work.










      share|improve this question
















      My situation:



      I upgraded the firmware of my Lenovo T480 (via Ubuntu's "application store") and everything went fine except that I was running 4.18 kernel before and now it did not boot anymore due to some signature problem (Secure Boot is enabled). No problem, I just selected 4.15 from boot menu and it still worked (why?).



      So, I installed the newest 5.0.0. However, after reboot I noticed that USB didn't work, WLAN didn't work and even the external display didn't work anymore. Then I installed 4.17. Same problem. It seems that only the default 4.15 now works.



      Any ideas what has happened?



      There are no errors when installing the other kernels. It's just after reboot I'm lacking USB, WLAN and HDMI. Otherwise the kernels seem to work.







      boot 18.04 usb kernel hdmi






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Sep 27 at 11:11







      user205301

















      asked Sep 24 at 13:24









      user205301user205301

      9731 gold badge7 silver badges16 bronze badges




      9731 gold badge7 silver badges16 bronze badges























          1 Answer
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          1



















          Do you have the newest HWE stack?
          Perhaps



          sudo apt install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04


          helps.



          Before executing you should read here: https://wiki.ubuntu.com/Kernel/LTSEnablementStack






          share|improve this answer


























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            1 Answer
            1






            active

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            active

            oldest

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            active

            oldest

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            1



















            Do you have the newest HWE stack?
            Perhaps



            sudo apt install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04


            helps.



            Before executing you should read here: https://wiki.ubuntu.com/Kernel/LTSEnablementStack






            share|improve this answer





























              1



















              Do you have the newest HWE stack?
              Perhaps



              sudo apt install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04


              helps.



              Before executing you should read here: https://wiki.ubuntu.com/Kernel/LTSEnablementStack






              share|improve this answer



























                1















                1











                1









                Do you have the newest HWE stack?
                Perhaps



                sudo apt install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04


                helps.



                Before executing you should read here: https://wiki.ubuntu.com/Kernel/LTSEnablementStack






                share|improve this answer














                Do you have the newest HWE stack?
                Perhaps



                sudo apt install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04


                helps.



                Before executing you should read here: https://wiki.ubuntu.com/Kernel/LTSEnablementStack







                share|improve this answer













                share|improve this answer




                share|improve this answer










                answered Sep 27 at 6:36









                ubuntuuserubuntuuser

                454 bronze badges




                454 bronze badges































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