HDMI port not detected on Ubuntu 18.04












1















the HDMI port of my lenovo ideapad 500s with Ubuntu 18.04 LTS is not working.



I also executed the xrandr command, but only the primary monitor is detected.



How can I solve my problem?



How can I check that HDMI is not broken?



Thanks in advance.






18.04 multiple-monitors hdmi







share|improve this question

























  • Concerning your second question about your HDMI cable, please try out, if you have the same problem when starting from a live-cd/usb of ubuntu.

    – BenSower
    Jan 2 at 15:46
















1















the HDMI port of my lenovo ideapad 500s with Ubuntu 18.04 LTS is not working.



I also executed the xrandr command, but only the primary monitor is detected.



How can I solve my problem?



How can I check that HDMI is not broken?



Thanks in advance.






18.04 multiple-monitors hdmi







share|improve this question

























  • Concerning your second question about your HDMI cable, please try out, if you have the same problem when starting from a live-cd/usb of ubuntu.

    – BenSower
    Jan 2 at 15:46














1












1








1








the HDMI port of my lenovo ideapad 500s with Ubuntu 18.04 LTS is not working.



I also executed the xrandr command, but only the primary monitor is detected.



How can I solve my problem?



How can I check that HDMI is not broken?



Thanks in advance.






18.04 multiple-monitors hdmi







share|improve this question
















the HDMI port of my lenovo ideapad 500s with Ubuntu 18.04 LTS is not working.



I also executed the xrandr command, but only the primary monitor is detected.



How can I solve my problem?



How can I check that HDMI is not broken?



Thanks in advance.






18.04 multiple-monitors hdmi




18.04 multiple-monitors hdmi






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Sep 26 '18 at 8:48







Federico Magliani

















asked Sep 26 '18 at 8:29









Federico MaglianiFederico Magliani

3815




3815













  • Concerning your second question about your HDMI cable, please try out, if you have the same problem when starting from a live-cd/usb of ubuntu.

    – BenSower
    Jan 2 at 15:46



















  • Concerning your second question about your HDMI cable, please try out, if you have the same problem when starting from a live-cd/usb of ubuntu.

    – BenSower
    Jan 2 at 15:46

















Concerning your second question about your HDMI cable, please try out, if you have the same problem when starting from a live-cd/usb of ubuntu.

– BenSower
Jan 2 at 15:46





Concerning your second question about your HDMI cable, please try out, if you have the same problem when starting from a live-cd/usb of ubuntu.

– BenSower
Jan 2 at 15:46










1 Answer
1






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oldest

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1















How can I solve my problem?




What worked for me (Lenovo thinkpad x1 Carbon, Ubuntu 18.04 LTS), is either switching the display manager back and forth between gdm3 and lightdm



sudo dpkg-reconfigure gdm3


and/or reinstalling lightdm and reconfiguring it again instead of using gdm3



sudo apt-get install --reinstall lightdm ubuntu-desktop





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    1 Answer
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    active

    oldest

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    active

    oldest

    votes






    active

    oldest

    votes









    1















    How can I solve my problem?




    What worked for me (Lenovo thinkpad x1 Carbon, Ubuntu 18.04 LTS), is either switching the display manager back and forth between gdm3 and lightdm



    sudo dpkg-reconfigure gdm3


    and/or reinstalling lightdm and reconfiguring it again instead of using gdm3



    sudo apt-get install --reinstall lightdm ubuntu-desktop





    share|improve this answer




























      1















      How can I solve my problem?




      What worked for me (Lenovo thinkpad x1 Carbon, Ubuntu 18.04 LTS), is either switching the display manager back and forth between gdm3 and lightdm



      sudo dpkg-reconfigure gdm3


      and/or reinstalling lightdm and reconfiguring it again instead of using gdm3



      sudo apt-get install --reinstall lightdm ubuntu-desktop





      share|improve this answer


























        1












        1








        1








        How can I solve my problem?




        What worked for me (Lenovo thinkpad x1 Carbon, Ubuntu 18.04 LTS), is either switching the display manager back and forth between gdm3 and lightdm



        sudo dpkg-reconfigure gdm3


        and/or reinstalling lightdm and reconfiguring it again instead of using gdm3



        sudo apt-get install --reinstall lightdm ubuntu-desktop





        share|improve this answer














        How can I solve my problem?




        What worked for me (Lenovo thinkpad x1 Carbon, Ubuntu 18.04 LTS), is either switching the display manager back and forth between gdm3 and lightdm



        sudo dpkg-reconfigure gdm3


        and/or reinstalling lightdm and reconfiguring it again instead of using gdm3



        sudo apt-get install --reinstall lightdm ubuntu-desktop






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Jan 2 at 10:43









        BenSowerBenSower

        220138




        220138






























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