Public bug reported:

The latest nvidia update causes X.org to crash as soon as I try to login
with gdm. I can login to Wayland for a few minutes but it then crashes
as well. While going through dmesg I saw the following. It appears that
the crash is happening because I disabled UEFI secure boot. Once I
reenabled it the system become stable and I can now use X.org or
Wayland.

Oct 10 13:48:49 ltrager-laptop kernel: PKCS#7 signature not signed with a 
trusted key
Oct 10 13:48:49 ltrager-laptop kernel: nvidia-modeset: Loading NVIDIA Kernel 
Mode Setting Driver for UNIX platforms  390.77  Tue Jul 10 22:10:46 PDT 2018
Oct 10 13:48:49 ltrager-laptop kernel: PKCS#7 signature not signed with a 
trusted key
Oct 10 13:48:49 ltrager-laptop kernel: [drm] [nvidia-drm] [GPU ID 0x00000100] 
Loading driver
Oct 10 13:48:49 ltrager-laptop kernel: [drm] Initialized nvidia-drm 0.0.0 
20160202 for 0000:01:00.0 on minor 0
Oct 10 13:48:49 ltrager-laptop kernel: PKCS#7 signature not signed with a 
trusted key
Oct 10 13:48:49 ltrager-laptop kernel: nvidia-uvm: Loaded the UVM driver in 8 
mode, major device number 239
Oct 10 13:48:49 ltrager-laptop systemd-udevd[4290]: Process 
'/sbin/create-uvm-dev-node' failed with exit code 1.

** Affects: nvidia-graphics-drivers-390 (Ubuntu)
     Importance: Undecided
         Status: New

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Packages, which is subscribed to nvidia-graphics-drivers-390 in Ubuntu.
https://bugs.launchpad.net/bugs/1797235

Title:
  Xorg crashes when using nvidia-driver-390 with secure boot disabled

Status in nvidia-graphics-drivers-390 package in Ubuntu:
  New

Bug description:
  The latest nvidia update causes X.org to crash as soon as I try to
  login with gdm. I can login to Wayland for a few minutes but it then
  crashes as well. While going through dmesg I saw the following. It
  appears that the crash is happening because I disabled UEFI secure
  boot. Once I reenabled it the system become stable and I can now use
  X.org or Wayland.

  Oct 10 13:48:49 ltrager-laptop kernel: PKCS#7 signature not signed with a 
trusted key
  Oct 10 13:48:49 ltrager-laptop kernel: nvidia-modeset: Loading NVIDIA Kernel 
Mode Setting Driver for UNIX platforms  390.77  Tue Jul 10 22:10:46 PDT 2018
  Oct 10 13:48:49 ltrager-laptop kernel: PKCS#7 signature not signed with a 
trusted key
  Oct 10 13:48:49 ltrager-laptop kernel: [drm] [nvidia-drm] [GPU ID 0x00000100] 
Loading driver
  Oct 10 13:48:49 ltrager-laptop kernel: [drm] Initialized nvidia-drm 0.0.0 
20160202 for 0000:01:00.0 on minor 0
  Oct 10 13:48:49 ltrager-laptop kernel: PKCS#7 signature not signed with a 
trusted key
  Oct 10 13:48:49 ltrager-laptop kernel: nvidia-uvm: Loaded the UVM driver in 8 
mode, major device number 239
  Oct 10 13:48:49 ltrager-laptop systemd-udevd[4290]: Process 
'/sbin/create-uvm-dev-node' failed with exit code 1.

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