Hi’ @hlev and others
Inspired by this thread I have had a closer look at my laptop.
I have a HP laptop running windows 10 and Darktable 2.6.2 equipped with 2 GPUs: Intel HD Graphics Family and NVIDIA GeForce GTX 850M. NVIDIA is the fastest.
Using the default setup - opencl_device_priority= star/!0,star/star/star - Darktable primarily use Intel except for export in which case NVIDIA is used exclusively. I type “star” instead of “*” to make sure the text is correct.
When I start Darktable with “darktable –d opencl” no screen output is visible, the output seems to be overwritten at once. I assume that Intel is no. 0 and NVIDIA is no. 1. I can’t figure out how to make the output visible. Can anyone help?
Inspired by the example in the 2.4 manual I have tried the following setting: !0,star
/!1,star/1,star/1,star which results in more use of NVIDIA, but Intel is still the preferred GPU.
I have tested many different settings but have not been able to make Darktable use NVIDIA primarily. In some cases Darktable just give up and use Intel exclusively. This is also the case when I use the setup: 1,!0/!0,!1/1,!0/1,!0 - NVIDIA is not used!
I seems to me that Darktable is not working as described in the manual in respect to device priority.