OpenCL error on Ubuntu

[YossiCohen]

System information (version)

• mandelbulber2 => 2.25 (appimage)
• Operating System / Platform => Ubuntu 20.04 and a GTX 1080 card.
• Compiler => :appimage:

Detailed description

When I Checking the "OpenCL enable" check box I get this error: Error: There are no valid OpenCl platforms in the system

looking in the log file I can see this: ........ PID: 2943182, time: 46.614194234, Debug: XmbTextListToTextProperty result code -2 PID: 2943182, time: 46.633674055, Debug: XmbTextListToTextProperty result code -2 PID: 2943182, time: 49.326428377, Critical: OpenCl ERROR: "cl::Platform::get" ( -1 ) (../src/opencl_hardware.cpp:378, static bool cOpenClHardware::checkErr(cl_int, QString) PID: 2943182, time: 49.326870462, Error: There are no valid OpenCl platforms in the system PID: 2943182, time: 49.330153453, Debug: XmbTextListToTextProperty result code -2 PID: 2943182, time: 49.331770670, Debug: XmbTextListToTextProperty result code -2 PID: 2943182, time: 49.333404247, Debug: XmbTextListToTextProperty result code -2 PID: 2943182, time: 51.778677323, Critical: OpenCl is not available (../src/opencl_hardware.cpp:254, void cOpenClHardware::CreateContext(int, cOpenClDevice::enumOpenClDeviceType) PID: 2943182, time: 56.226017873, Debug: XmbTextListToTextProperty result code -2 PID: 2943182, time: 56.227894025, Debug: XmbTextListToTextProperty result code -2 .......

[buddhi1980]

If you try version 2.24, do you observe the same problem?

[YossiCohen]

Thanks for the prompt response, I've downloaded this release: _Mandelbulber_v2-2.24-x8664.appimage

and I get the same error, this is what the console show:

Debug: XmbTextListToTextProperty result code -2 Critical: OpenCl ERROR: "cl::Platform::get" ( -1 ) (../src/opencl_hardware.cpp:344, static bool cOpenClHardware::checkErr(cl_int, QString))

Error: There are no valid OpenCl platforms in the system Debug: XmbTextListToTextProperty result code -2 Debug: XmbTextListToTextProperty result code -2

Is there any prerequisite software that needs to be installed on the machine? I am using Blender on the machine and it works fine with the GPU (Cuda)

BTW, It also happened when I've installed Mandelbulber2 from: dl.flathub.org via the Ubuntu Software center (like app store) it was version 2.24

[YossiCohen]

Is there any prerequisite software that needs to be installed on the machine?

[buddhi1980]

You need to install GFX driver with OpenCL support like nvidia-opencl

[buddhi1980]

You can try to install ocl-icd-libopencl1 Here is instruction how to install nvidia driver: https://www.kali.org/docs/general-use/install-nvidia-drivers-on-kali-linux/

[networkpanic]

install opencl following your distro documentation.