I'm having problems with my dual display since moving to 21.04

The additional drivers tab shows nothing.

I've got the correct NVIDIA driver installed.

sudo lshw -c video
[sudo] password for mark: 
  *-display UNCLAIMED       
       description: VGA compatible controller
       product: G84GLM [Quadro FX 1600M]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list
       configuration: latency=0
       resources: memory:f5000000-f5ffffff memory:e0000000-efffffff memory:f2000000-f3ffffff ioport:ef00(size=128) memory:c0000-dffff

hwinfo --gfxcard
17: PCI 100.0: 0300 VGA compatible controller (VGA)             
  [Created at pci.386]
  Unique ID: VCu0.ZsCrSDGwGdA
  Parent ID: vSkL.K4GjMdJvpVB
  SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:01:00.0
  SysFS BusID: 0000:01:00.0
  Hardware Class: graphics card
  Model: "nVidia Quadro FX 1600M"
  Vendor: pci 0x10de "nVidia Corporation"
  Device: pci 0x040d "Quadro FX 1600M"
  SubVendor: pci 0x1028 "Dell"
  SubDevice: pci 0x019b 
  Revision: 0xa1
  Memory Range: 0xf5000000-0xf5ffffff (rw,non-prefetchable)
  Memory Range: 0xe0000000-0xefffffff (ro,non-prefetchable)
  Memory Range: 0xf2000000-0xf3ffffff (rw,non-prefetchable)
  I/O Ports: 0xef00-0xef7f (rw)
  Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled)
  IRQ: 5 (no events)
  I/O Port: 0x00 (rw)
  Module Alias: "pci:v000010DEd0000040Dsv00001028sd0000019Bbc03sc00i00"
  Driver Info #0:
    XFree86 v4 Server Module: nv
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #14 (PCI bridge)

Primary display adapter: #17

Any ideas?


Thanks for your input

I've followed your help, and here's the result:

$ dkms status nvidia
nvidia, 390.143, 5.11.0-18-generic, x86_64: installed
$ uname -r

Then the log file has these lines:

[   102.764] (II) LoadModule: "nvidia"
[   102.806] (WW) Warning, couldn't open module nvidia
[   102.806] (EE) Failed to load module "nvidia" (module does not exist, 0)


I've fixed it - I just don't know how!

  • It means probably that you have Secure Boor enabled. Disable it in order to allow Nvidia drivers to be loaded. Jun 6, 2021 at 16:39

1 Answer 1


'UNCLAIMED' means that no driver has been loaded for that card. If you take a look at this line:

       configuration: latency=0

If it had loaded the nvidia driver, it would look like this:

       configuration: driver=nvidia latency=0

How did you install the driver? Are you sure it was installed successfully?

First, check dkms to make sure the module says it's installed and that it matches your current kernel; your numbers might differ from this example:

$ dkms status nvidia
nvidia, 465.19.01, 5.4.0-74-generic, x86_64: installed
$ uname -r

If that's correct, check the log file at /var/log/Xorg.0.log and read through it, looking for any lines that contain NVIDIA or (EE) to see if the driver encountered any errors that might provide a clue as to what is going wrong.


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