GTX 1060 5 GB not supported

Graphics / Linux Linux
1

I installed a driver from the graphics-drivers ppa on Ubuntu 18.04, which should support the GTX 1060 5 GB:

https://download.nvidia.com/XFree86/Linux-x86_64/415.27/README/supportedchips.html

However, it dmesg shows repeated errors like this one:

[   19.766252] nvidia-nvlink: Nvlink Core is being initialized, major device number 235
[   19.766685] nvidia 0000:09:00.0: vgaarb: changed VGA decodes: olddecodes=none,decodes=none:owns=none
[   19.766719] NVRM: The NVIDIA GPU 0000:09:00.0 (PCI ID: 10de:1c04)
               NVRM: installed in this system is not supported by the
               NVRM: NVIDIA 415.27 driver release.
               NVRM: Please see 'Appendix A - Supported NVIDIA GPU Products'
               NVRM: in this release's README, available on the operating system
               NVRM: specific graphics driver download page at www.nvidia.com.
[   19.766768] nvidia: probe of 0000:09:00.0 failed with error -1
[   19.766780] NVRM: The NVIDIA probe routine failed for 1 device(s).
[   19.766781] NVRM: None of the NVIDIA graphics adapters were initialized!
[   19.766871] nvidia-nvlink: Unregistered the Nvlink Core, major device number 235

The PCI identifier seems to be correct:

https://pci-ids.ucw.cz/read/PC/10de/1c04

2

The pci identifier of the HDMI section does not match:

$ lspci -nn | grep NVIDIA
09:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP106 [GeForce GTX 1060 5GB] [10de:1c04] (rev a1)
09:00.1 Audio device [0403]: NVIDIA Corporation GF116 High Definition Audio Controller [10de:0bee] (rev a1)

So maybe this is counterfeit, like:

https://devtalk.nvidia.com/default/topic/1057017/linux/gtx-1050-ti-pci-id-10de-1c82-unsupported-by-430-34/