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Amiable_experiencebe56
Participant
Nov 3, 2026 3:26 AM UTC
Question

Lightroom Classic 15.6 – AMD RX 6800 not recognized for GPU acceleration

System configuration

  • Lightroom Classic 15.6 (Creative Cloud subscription)

  • Camera Raw 18.7

  • Windows 10 Business Edition (Build 19045, 64-bit)

  • GPU: AMD Radeon RX 6800, 16 GB VRAM

  • CPU: 12 logical processors, 3.9 GHz

  • RAM: 16 GB

  • Camera: Canon 5D Mark IV

  • RAW format: CR2

Problem description

After updating to Lightroom Classic 15.6, the AI Denoise feature became extremely slow, taking approximately 15–20 minutes per RAW image.

Lightroom was detecting the AMD Radeon RX 6800, but it was not using GPU acceleration.

The Performance preferences panel displayed the following warning:

"GPU acceleration is not supported by your system."

The Lightroom system information report showed:

  • Initial GPU status: Unsupported GPU

  • GPUDeviceEnabled: false

  • Dedicated GPU memory used by Lightroom: 0 MB

  • GPU renderer: AMD Radeon RX 6800

  • GPU memory: 16,338 MB

  • Direct2DEnabled: false

Troubleshooting steps performed

I tried the following:

  1. Updated the AMD Radeon RX 6800 graphics drivers.

  2. Restarted the computer.

  3. Deleted the Camera Raw GPU configuration file to force Lightroom to rebuild its GPU configuration.

  4. Checked Lightroom Classic Performance preferences.

  5. Verified that Windows correctly detected the GPU and that Lightroom identified it as an AMD Radeon RX 6800.

None of these steps resolved the issue in version 15.6.

Version comparison test

To isolate the problem, I installed Lightroom Classic 15.4.1 and tested the same hardware and RAW files.

Results:

  • Lightroom Classic 15.6: GPU detected but marked as unsupported. AI Denoise took approximately 15–20 minutes per image.

  • Lightroom Classic 15.4.1: GPU correctly recognized and AI Denoise completed in approximately 30 seconds per image.

No hardware changes were made between these tests.

Conclusion

The comparison strongly suggests a GPU detection or initialization regression introduced in Lightroom Classic 15.5/15.6, potentially related to AMD Radeon RX 6800 compatibility.

The hardware works correctly with Lightroom Classic 15.4.1, so this does not appear to be a GPU hardware limitation or a driver installation issue.

Could Adobe investigate this GPU compatibility issue and provide a fix in a future Lightroom Classic update?

I would appreciate any additional diagnostic steps or information that could help identify the cause.

Thank you.

2 replies

CORCTON34033231
Community Expert
CORCTON34033231Community Expert
Community Expert
Nov 3, 2026 9:00 AM UTC

Hi, thanks for the detailed comparison. Here are Adobe's official GPU troubleshooting steps to try in order (from Troubleshoot graphics processor (GPU) and graphics driver issues | Lightroom Classic):

 

1. Confirm you are using the latest version of Lightroom Classic (Help > Updates).

2. Confirm your graphics card is compatible with Lightroom Classic.

3. Update your graphics card driver directly from the manufacturer's website — for Windows, download the most recent AMD driver from AMD, not only via Windows Update.

4. Perform a clean installation of the graphics card driver, using the AMD Clean Uninstall Utility to remove previous versions first, then install the latest AMD driver.

5. After installing the updates, relaunch Lightroom Classic and turn on Use Graphics Processor in Edit > Preferences > Performance.

6. Disable third-party graphics accelerators, such as GPU overclocking utilities.

 

The clean-install step in step 4 is the one step above that goes beyond a regular driver update, so it is worth trying in that order if you have not already done a clean install. Official document: https://helpx.adobe.com/lightroom-classic/desktop/technical-support/technical-issues/gpu-issues/troubleshoot-gpu.html

 

If the message is still shown after those steps, please share the exact driver version you installed and the Use Graphics Processor setting shown in Edit > Preferences > Performance.

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    Amiable_experiencebe56Author
    Participant
    Nov 3, 2026 1:32 PM UTC

    Thanks for your suggestions.

    I've already updated the AMD driver directly from AMD, restarted the system, deleted the Camera Raw GPU configuration file and checked Lightroom's GPU settings.

    The only step I haven't tried yet is a clean driver installation using AMD Cleanup Utility.

    One important clarification: Lightroom Classic 15.6 does recognize my AMD RX 6800, but it does not enable GPU acceleration. The system report shows "GPU not supported" and GPUDeviceEnabled: false.

    I also tested Lightroom Classic 15.4.1 on the same computer with the same RAW files. In that version, GPU acceleration works correctly, and AI Denoise takes approximately 12 seconds per image, compared to 15–20 minutes in version 15.6.

    I'll try a clean driver installation, but the difference between these two versions suggests a possible GPU initialization or compatibility issue in Lightroom 15.6.

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