Graphic card driver becomes undetected after a few days

I am running Ubuntu 18.05.
The graphics card ( 2080 Ti ) would run fine for a few days.
Then the system would crash and on reboot,
The following message. What is wrong?
Assistance appreciated.


NVIDIA-SMI has failed because it couldn’t communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.6 LTS
Release: 18.04
Codename: bionic

lspci | grep -v nvi

00:00.0 Host bridge: Intel Corporation Device 3e30 (rev 0d)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 0d)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake PCH SATA AHCI Controller (rev 10)
00:1b.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port 21 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port 9 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Device a308 (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-V (rev 10)
01:00.0 VGA compatible controller: NVIDIA Corporation GV102 (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 10f7 (rev a1)
01:00.2 USB controller: NVIDIA Corporation Device 1ad6 (rev a1)
01:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device 1ad7 (rev a1)
02:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5722 Gigabit Ethernet PCI Express
03:00.0 Non-Volatile memory controller: Device 1cc1:8201 (rev 03)

root@deep:~# dmesg | grep -i nvi
[ 5.024447] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input10
[ 5.024477] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input11
[ 5.024500] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input12
[ 5.024525] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input13

root@deep:~# lsmod | grep -i nvi

root@deep:~# apt list --installed | grep -i nvid

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

libnvidia-cfg1-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
libnvidia-common-440/unknown,now 440.118.02-0ubuntu1 all [installed,automatic]
libnvidia-compute-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
libnvidia-decode-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
libnvidia-encode-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
libnvidia-fbc1-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
libnvidia-gl-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
libnvidia-ifr1-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
nvidia-compute-utils-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
nvidia-cuda-dev/bionic,now 9.1.85-3ubuntu1 amd64 [installed,auto-removable]
nvidia-cuda-doc/bionic,now 9.1.85-3ubuntu1 all [installed,auto-removable]
nvidia-cuda-gdb/bionic,now 9.1.85-3ubuntu1 amd64 [installed,auto-removable]
nvidia-dkms-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
nvidia-driver-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed]
nvidia-kernel-common-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
nvidia-kernel-source-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
nvidia-opencl-dev/bionic,now 9.1.85-3ubuntu1 amd64 [installed,auto-removable]
nvidia-prime/bionic-updates,now 0.8.16~ all [installed,automatic]
nvidia-profiler/bionic,now 9.1.85-3ubuntu1 amd64 [installed,auto-removable]
nvidia-settings/unknown,now 470.57.02-0ubuntu1 amd64 [installed,automatic]
nvidia-utils-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]
nvidia-visual-profiler/bionic,now 9.1.85-3ubuntu1 amd64 [installed,auto-removable]
xserver-xorg-video-nvidia-440/unknown,now 440.118.02-0ubuntu1 amd64 [installed,automatic]

try remove the driver and after download driver new version.