I installed Nvidia driver on my laptop, but when i execute nvidia-smi , i got this error:

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

Installed Driver : sudo apt install nvidia-driver-455

Kernel : Linux 5.4.0-47-generic

Selected GPU : sudo prime-select nvidia

Log :

`cat /var/log/gpu-manager.log  log_file: /var/log/gpu-manager.log 
last_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot new_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot 
can't access /opt/amdgpu-pro/bin/amdgpu-pro-px  
Looking for nvidia modules in /lib/modules/5.4.0-47-generic/updates/dkms 
Found nvidia module: nvidia.ko 
Looking for amdgpu modules in /lib/modules/5.4.0-47-generic/updates/dkms 
Is nvidia loaded? yes 
Was nvidia unloaded? no 
Is nvidia blacklisted? no 
Is intel loaded? yes Is radeon loaded? no 
Is radeon blacklisted? no 
Is amdgpu loaded? no 
Is amdgpu blacklisted? no 
Is amdgpu versioned? no 
Is amdgpu pro stack? no 
Is nouveau loaded? no 
Is nouveau blacklisted? yes 
Is nvidia kernel module available? yes 
Is amdgpu kernel module available? no 
Vendor/Device Id: 8086:166 BusID "PCI:0@0:2:0" Is boot vga? yes Vendor/Device Id: 10de:de3 BusID "PCI:1@0:0:0" Is boot vga? no Error: can't access /sys/bus/pci/devices/0000:01:00.0/driver The device is not bound to any driver. 
Skipping "/dev/dri/card0", driven by "i915" Skipping "/dev/dri/card0", driven by "i915" 
Skipping "/dev/dri/card0", driven by "i915" 
Found "/dev/dri/card0", driven by "i915" output 0:  card0-LVDS-1 Number of connected outputs for /dev/dri/card0: 1 
Does it require offloading? yes 
last cards number = 2 
Has amd? no 
Has intel? yes 
Has nvidia? yes 
How many cards? 2 
Has the system changed? No 
Intel IGP detected Intel hybrid system 
Creating /usr/share/X11/xorg.conf.d/11-nvidia-prime.conf 
Setting power control to "on" in /sys/bus/pci/devices/0000:01:00.0/power/control 
Loading nvidia with "no" parameters`

Any idea to resolve this problem?


  • Did you reboot after installing the new 455 driver? That sometimes helps. – ubfan1 Nov 21 at 19:35
  • Yes i reboot after installing but the problem not resolving – Mokhless Hachicha Nov 21 at 20:15
  • Please add the contents of /var/log/gpu-manager.log to your question to provide more information. How did you get the 455 drivers? They are now a part of the standard repos, so no ppa or direct-from-nvidia download necessary. – ubfan1 Nov 21 at 20:55
  • I added the log in description, i installed driver from standard repos – Mokhless Hachicha Nov 21 at 21:01
  • 1
    The nvidia blacklisted=yes is a problem. Check the /etc/modprobe.d directory for any file blacklisting nvidia. nvidiafb is OK to blacklist. – ubfan1 Nov 21 at 21:06

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