Hello Team,

I'm experiencing similiar issue on Ubuntu 16.04 on Dell 5820 Tower. I'm
using Display port monitor, inorder to get proper display I need to
download nvidia driver from ppa:graphics-drivers/ppa

After install nvidia-384 and did a reboot, still no display, but can
able to see the PCI modules conflicted

#lspci -v 
lspci: Cannot open /sys/bus/pci/devices/0000:00:03.0/resource: No such file or 
directory

There is no issue with Ubuntu 18.04 , which is works perfectly on the
same machine. Ubuntu 16.04 having issue.


Below is the environment details. 
=================================

Ubuntu 16.04.4 LTS Xenial
Kernel - 4.15.0-46-generic

NVIDIA Quadro P4000

$lshw -C Display
WARNING: you should run this program as super-user.
  *-display               
       description: VGA compatible controller
       product: NVIDIA Corporation
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:65:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:29 memory:d7000000-d7ffffff memory:c0000000-cfffffff 
memory:d0000000-d1ffffff ioport:b000(size=128) memory:d8000000-d807ffff

#dpkg -l  | grep  xserver-xorg-core-hwe-16.04
ii  xserver-xorg-core-hwe-16.04                 2:1.19.5-0ubuntu2~16.04.1     


$dpkg -l | grep nvid
ii  nvidia-384                                  384.130-0ubuntu0.16.04.1        
              amd64        NVIDIA binary driver - version 384.130
ii  nvidia-opencl-icd-384                       384.130-0ubuntu0.16.04.1        
              amd64        NVIDIA OpenCL ICD
ii  nvidia-prime                                0.8.2                           
              amd64        Tools to enable NVIDIA's Prime
ii  nvidia-settings                             415.27-0ubuntu0~gpu16.04.1      
              amd64        Tool for configuring the NVIDIA graphics driver

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https://bugs.launchpad.net/bugs/1772787

Title:
  lspci command cannot work normally in ubuntu16.04.4 with 4.10.0-40
  kernel

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