Hi all,
I just want to let you know that I finally manage to get my "old" R9
270X (Sea Island) AMD graphic card working with dt and opencl.
Steps :
1- install 18.40 driver version with "-y --opencl=legacy --headless" switchs
2- set GPU_FORCE_64BIT_PTR=1
Now you have something "almost" working, except that it produce weird
artefacts in the bottom of images (it's a driver bug, some other
programs produce artefacts too). And now the strange trick : use "-d
perf" switch with darktable...
3- "GPU_FORCE_64BIT_PTR=1 darktable -d perf" is working like a charm,
and I've just saved 150€ :)
The question is WHY ? What is doing dt with that switch which prevent
artefacts ?
Althought it's clearly a driver bug, it can be interesting to find the
root cause of the "solution"
AlicVB
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