One thing I forgot to mention: nvidia-prime is also broken on
nvidia-340.  Even with Intel graphics in use instead of NVIDIA, the
laptop remains unusable.

It's fine for newer drivers, like nvidia-driver-415

** Also affects: nvidia-prime (Ubuntu)
   Importance: Undecided
       Status: New

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-prime in Ubuntu.
https://bugs.launchpad.net/bugs/1806817

Title:
  PKCS#7 signature not signed with a trusted key

Status in nvidia-graphics-drivers-340 package in Ubuntu:
  New
Status in nvidia-prime package in Ubuntu:
  New

Bug description:
  It's hard to report this bug on a laptop with this driver installed,
  so I'm reporting this with on my laptop with a much newer NVIDIA
  driver (but not recommended).

  My laptop, Lenovo Z40, has NVIDIA GeForce GT820M.  With nvidia-340
  driver installed it won't boot to SDDM (also tried with LightDM).
  Opening up another TTY is useless because the same message "PKCS#7
  signature not signed with a trusted key" keeps getting spammed.  I had
  to go to recovery to switch to Intel graphics.

  [CODE]
  $ lspci
  03:00.0 3D controller: NVIDIA Corporation GF117M [GeForce 610M/710M/810M/820M 
/ GT 620M/625M/630M/720M] (rev a1)
  [/CODE]

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