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Thread: Newer nVidia drivers 390.77 can't detect external display on Lenovo ThinkPad

  1. #1
    Join Date
    Oct 2018
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    Newer nVidia drivers 390.77 can't detect external display on Lenovo ThinkPad

    After recent update of nVidia drivers to 390.77 on Ubuntu 18.04 my external display stopped working. Is there some way to fix it (check X config/etc.) or at least to rollback to previous minor version of drivers (was 390.66 or something similar)? xrandr shows only internal screen.

    Lenovo ThinkPad P50, nVidia Quadro M1000M
    Ubuntu 18.04 (4.15.0-36-generic), nvidia 390.77

  2. #2
    Join Date
    Sep 2009
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    Xubuntu

    Re: Newer nVidia drivers 390.77 can't detect external display on Lenovo ThinkPad

    If you go into Settings -> Additional Drivers you should be able to choose from several drivers.

  3. #3
    Join Date
    Oct 2018
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    Re: Newer nVidia drivers 390.77 can't detect external display on Lenovo ThinkPad

    I see only two: nvidia 390.77 tested and nouveau. If I try to apt install nvidia-384 or 375 it still installs 390.

  4. #4
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    Re: Newer nVidia drivers 390.77 can't detect external display on Lenovo ThinkPad

    I apologize for giving you bad info: they used to always be listed there. Evidently, as I just found out for myself, they are no longer listed. Maybe someone else will be able to help out here.

  5. #5
    Join Date
    Oct 2018
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    4

    Re: Newer nVidia drivers 390.77 can't detect external display on Lenovo ThinkPad

    No problem. I Nvidia's bug report I see:
    ERROR: Kernel configuration is invalid."
    include/generated/autoconf.h or include/config/auto.conf are missing."
    Run 'make oldconfig && make prepare' on kernel src to fix it."
    Is it safe to run those commands? Where I should run them? Thanks

  6. #6
    Join Date
    Oct 2018
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    4

    Re: Newer nVidia drivers 390.77 can't detect external display on Lenovo ThinkPad

    Disabling NVIDIA KMS (enabled by default in 390.77) resolves the issue:
    Edit /lib/modprobe.d/nvidia-kms.conf file and set modeset to 0:
    options nvidia-drm modeset=0

    Save, update initramfs and reboot:
    sudo update-initramfs -u
    reboot

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