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My dual monitors were working perfectly yesterday, but when I turned on my PC today, the monitors will only work when plugged into the motherboard to use the Intel integrated graphics.

I have the Nvidia X Server Settings (nvidia-driver-418) app downloaded (it was auto-detected and auto-installed). Any recommendations?

Note: this is occurring on Ubuntu 19.04.

EDIT: The GPU doesn't show up in Settings > Details > About. The only graphics listed is 'Intel HD Graphics 530 (Skylake GT2)'.

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  • What does prime-select query return?
    – WinEunuuchs2Unix
    Apr 19, 2019 at 20:14
  • I guess the bigger question is what changed between yesterday and today? Can you reboot and select "Advanced Options" on grub menu and select previous kernel? Does it work OK?
    – WinEunuuchs2Unix
    Apr 19, 2019 at 20:22
  • 'prime-select query' returns 'nvidia'.
    – user945992
    Apr 21, 2019 at 22:04
  • Another user reported problems with 418 driver and using 396 driver solved the problem: askubuntu.com/questions/1135448/…. I'm using 384 driver with my GTX 970M and have never had a problem.
    – WinEunuuchs2Unix
    Apr 21, 2019 at 22:19
  • How can I permanently change which driver it's using? In Software & Updates, each time I change it, select a new one, click Apply Changes, and restart, it goes back to 'Using X.Org X server'.
    – user945992
    Apr 22, 2019 at 0:11

1 Answer 1

Reset to default
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Try this

$ sudo add-apt-repository ppa:graphics-drivers/ppa

$ ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd00001C03sv00001043sd000085ABbc03sc00i00
vendor   : NVIDIA Corporation
model    : GP106 [GeForce GTX 1060 6GB]
driver   : nvidia-driver-390 - distro non-free
driver   : nvidia-driver-396 - third-party free recommended
driver   : xserver-xorg-video-nouveau - distro free builtin

$ sudo ubuntu-drivers autoinstall

$ sudo apt install nvidia-396

$ reboot
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  • All the commands worked, but the second. Doing the last command caused the machine to restart. Now, both screens work while connected to the GPU, but I can't login... When I enter the password, the screen goes black, and it starts again like if I haven't already entered the password.
    – user945992
    Apr 19, 2019 at 19:49
  • please try to make your /home/username folder empty
    – Pradip N. Pawar
    Apr 21, 2019 at 8:49
  • I was able to login by: at the login screen, clicking Ctrl + Alt + F3, then typing in 'ls -lah', then 'sudo chown username:username .Xauthority'. Now the dual monitors don't work... only the one plugged into the motherboard...
    – user945992
    Apr 21, 2019 at 22:02

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