Ubuntu 18.04.3 LTS, RTX 2060 ,nvidia driver not loaded

Hi,

My office Ubuntu seems fail to work with nvidia driver this morning, after these lunar new year vacation. Before that I did install Netbeans on it with https://linuxize.com/post/how-to-install-netbeans-on-ubuntu-18-04/ . And I tried to remove Netbeans by

sudo snap remove netbeans --purge

, though this might not be relevant to the issue.

Before this morning, I use nvidia driver-410, then I tried to install driver-415 but it didn’t work.

Here’s some more detailed information about my Ubuntu computer.

$ nvidia-smi
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
$ lspci | grep -i --color 'vga\|3d\|2d'
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1f02 (rev a1)
$ sudo dkms status
nvidia, 415.27: added

Bug report would be attached later.
nvidia-bug-report.log.gz (62 KB)

Sorry it’s RTX 2070. My bad…