windows 10 , Metashape 1.5.4 with Radeon VII latest 19.8.1 drivers:
[GPU 1] Using device: AMD Radeon VII (gfx906), 60 compute units2019-08-20 20:12:28 Warning: CL_DEVICE_GLOBAL_FREE_MEMORY_AMD returned too big free memory! Data[8]=a8,54,ff,0,0,0,0,0 free_mem_size=16733352 global_mem_size=16580608
, free memory: 12953/16192 MB, OpenCL 2.0
Warning: CL_DEVICE_GLOBAL_FREE_MEMORY_AMD returned too big free memory! Data[8]=54,99,fe,0,0,0,0,0 free_mem_size=16685396 global_mem_size=16580608
Also happens during Refine Mesh process. Warning doesn't happen from the get go but after a job has been started and finished or canceled and a new one is started. Closing & restarting Metashape "fixes" it until it reappears.
Mak