OpenCL installation not working (nvidia 455) for kernel 5.4

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1

So I’m trying to setup OpenCL on my machine.

First I installed the CUDA Toolkit: sudo pacman -S cuda .
This prompted me to install opencl-nvidia which has several options for different drivers, I picked the 455 option (which I’m running).
After that I installed ocd-icd and opencl-headers .

Running ls /etc/OpenCL/vendors/ gives me nvidia.icd but running clinfo returns Number of platforms 0 .

and my kernel is 5.4.80.

It used to work for nvidia 440 driver

2

there is a similar post but the manjaro forum is not allowing me to add link to it. The suggested answer for that post says, it should work for kernel below 5.9

3

i’m running 5.4 and 455 and clinfo is correctly picking up my card. that combo DOES work, not sure what else is different about your setup

4

what is inside your /etc/OpenCL/vendors/nvidia.icd ?

5

libnvidia-opencl.so.1

6

the following command has the output for me:
locate libnvidia-opencl.so
/usr/lib/libnvidia-opencl.so.1
/usr/lib/libnvidia-opencl.so.440.100

7

i’m on testing, which may be affecting things: stable is about to have the nvidia drivers consolidated. so i don’t have opencl-nvidia-455xx installed, just opencl-nvidia which is currently at 455.

8

$ locate libnvidia-opencl.so
/usr/lib/libnvidia-opencl.so
/usr/lib/libnvidia-opencl.so.1
/usr/lib/libnvidia-opencl.so.455.45.01

9

this doesn’t match you saying you picked the 455 opencl package. check it got the right one?

10

I found the problem, my libnvidia is pointing(symlinked) to the wrong file

ls -l /usr/lib/libnvidia-opencl.so.1 0 < 20:13:13
lrwxrwxrwx 1 root root 27 Jun 29 03:06 /usr/lib/libnvidia-opencl.so.1 -> libnvidia-opencl.so.440.100*

But it’s weird, why I don’t have the 455 version of libnvidia-opencl

11

I have the 455 driver installed and cuda applications work on it. Doesn’t the 455 libnvidia-opencl gets installed when the 455 driver got installed

12

Is there a way to install the libnvidia-opencl.so.455 separately or should I reinstall the drivers?

13

repeat, please re-check you installed the correct opencl package

14

SOLVED
I just did “sudo pacman -Sy opencl-nvidia-455xx” and it replaced the 440 version. It’s weird though, why the driver update didn’t update this too

Thanks @steanne for the help

15

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