GPU acceleration does not work on new MacBook Pro Vega 20 + new LR Classic 9.0

[White Cloud]

Hi!

I updated to the newest Lightroom Classic 9.0, but unfortunately noticed that the full GPU acceleration is not working on my late 2018 MacBook Pro (15", i9, 32 Gt, Vega 20). I am running latest update of Mojave (10.14.6 (18G1012)).

The setting to use GPU for image processing is greyed out:

And system info is:

As far as I know, this machine should support full acceleration. Is this a bug with the new LR 9.0 update?

Thanks in advance & all the best,
Sakari Mäkelä
Photographer, Finland

[JP Hess]

Unless you have a 4K-5K high-resolution monitor, I wouldn't worry about it. That is primarily what GPU acceleration is for in Lightroom. Otherwise, you won't notice any benefit from having it. I'm using an old HP Pavilion desktop with NO GPU acceleration support, and have no issues with Lightroom Classic.

[Bob Somrak]

Exit Lightroom and check if there is a  "TempDisableGPU3" file left over at /Users/USERNAME/Library/Application Support/Adobe/CameraRaw/GPU (macOS) or C:\Users\USERNAME\AppData\Roaming\Adobe\CameraRaw\GPU (Windows)
If so delete that file and relaunch the application

[White Cloud]

Thank you for the tip! Unfortunately there was no such file in the folder, but there was a "Camera Raw CPU Config.txt" -file under Adobe Photoshop Lightroom Classic -folder (under GPU folder), and it had these kind of lines:

crs:gpu_preferred_system=""
crs:gpu_compute_digest="137EF1F9C01355E1646E2C7FED018D8C"
crs:gpu_compute_quick_self_test_passed="False"/>

So I suppose this is a bug in the new LR 9.0? Has any other with same kind of hardware noticed this issue?

[michaelh40768904]

Yes I have been having the same issue with Nvidia Quadro K2000. The test gives a false outcome. In the first instance Nvidia were very helpful but could not work out what Adobe test was asking for. Phone call from Adobe tech - yes a bug will be sorted. Bug fix came and GPU was recognised. Then latest release with Cat 2.2 update (thats a disaster but another story) and GPU no longer recognised. AGAIN. Worst the system is even slower. Adobe tend to pass the buck to the GPU supplier - it may be the solution is in the driver but this is an Adobes issue. Evident as last time no driver update only the Adobe bug fix.

Adobe should have contacted me this morning at 9am - its 9:45 now and no contact.

I had no issues with 8.4 super fast (4x pipeline ssd). Release 9 supposed to improve performance and catalogue - so far its been a bit of a disaster.

[White Cloud]

Good to know, thanks! 🙂 I think I'll downgrade back to 8.4 and wait until 9.0 gets some incremental updates and problems sorted out.