As listed in the latest CodeXL 2.6 release note (find the attachment), I can see couple of known issues that could be the reason for not working on Vega.
- "On Linux machines that have gfx900 (Vega) or gfx804 (Lexa) GPUs installed, OpenCL compilation fails."
- "On Linux machines, the OpenCL compilation does not support Vega (gfx9xx) devices."
For more information, please report your issue here: Issues · GPUOpen-Tools/CodeXL · GitHub
CodeXL_Release_Notes.pdf 275.7 KB
Another point to note. By default, CodeXL 2.6 uses Radeon Compute Profiler (RCP) 5.5. Now RCP 5.6 is available which fixed several issues with profiling on Linux systems with the amdgpu-pro driver installed if both "PAL" and "legacy" OpenCL support was installed by the driver (GitHub - GPUOpen-Tools/RCP: The Radeon Compute Profiler (RCP) is a performance analysis tool that gathers data from the … ).
I'm not sure if updating the RCP may help in this case. Anyway, I would suggest you to report your issue here: Issues · GPUOpen-Tools/CodeXL · GitHub