After installing CUDA 11, It removed my Nvidia driver.
$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.
$nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2020 NVIDIA Corporation
Built on Wed_Jul_22_19:09:09_PDT_2020
Cuda compilation tools, release 11.0, V11.0.221
Build cuda_11.0_bu.TC445_37.28845127_0
$uname -r
5.4.0-47-generic
It doesn’t allow me to select Nvidia from the software & updates center. Why is that?
Should I install my Nvidia driver manually? Because previously I had an issue with the black screen after installing manually the Nvidia driver. I need your suggestion. What should I do?
Looks like, CUDA 11 is incompatible with Nvidia 340.108, and that’s why when I install CUDA, It installed nvidia-driver-450 and removed nvidia 340.108.
Tue Sep 22 11:52:40 2020
+------------------------------------------------------+
| NVIDIA-SMI 340.108 Driver Version: 340.108 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce 820M Off | 0000:03:00.0 N/A | N/A |
| N/A 49C P0 N/A / N/A | 212MiB / 2047MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Compute processes: GPU Memory |
| GPU PID Process name Usage |
|=============================================================================|
| 0 Not Supported |
+-----------------------------------------------------------------------------+
Although sudo ubuntu-drivers autoinstall install nvidia-driver-450 but nvidia-smi show NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
Installing nvidia-driver-390 looks like compatible.
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 390.138 Driver Version: 390.138 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GT 820M Off | 00000000:03:00.0 N/A | N/A |
| N/A 55C P0 N/A / N/A | 214MiB / 1985MiB | N/A Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 Not Supported |
Now Which Cuda toolkit is compatible with the above driver?