Lightroom Classic: Serious White Balance Loupe lag with a non-zero Dehaze amount

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  • Problem
  • Updated 9 months ago
  • Acknowledged
  • (Edited)
Although I just noticed this problem in Lr Classic 9, it appears to be present in at least Lr Classic 8.

When I edit a large raw image like a panorama DNG, I am experiencing a significant lag between the White Balance Selector position and the sampling Loupe while moving the Selector around the image when the Dehaze setting is non-zero. Associated with this lag is a complete paralysis of Lr, which goes into a “not responding” state and blacks out the screen for a second or so, then comes back for a short time before going black “not responding” again. It repeats this over and over until I set the white balance with a click or replace the WB Selector on the basic panel.

Here’s an example. I have a wide panorama image open in Develop with no settings applied. I created a new catalogue with only this image for my test. Select the White Balance Selector and move it around the image reasonably quickly. The Loupe follows the eyedropper around the image with barely any lag. I have hovered over the blue sky to make the Navigator preview show a very warm image, as seen in the screen shot below.

Replace the WB Selector on the Basic panel. Change the Dehaze amount from zero to any value, even just +1, as I have in this example. Select the White Balance Selector again and move around the image as before. Now there is a significant lag between the position of the Selector (eyedropper) and the Loupe. The screen may go black while doing this with Lr going into “not responding”. I stop moving the Selector around and hover over the blue sky as before. In the screen shot below you can see the warm image in the Navigator preview.

After a few seconds the screen goes black for a second or so, like the screen shot here.

Lr then recovers back to the normal screen, but then goes black again after a short delay, repeating this sequence until I set the WB or deselect the WB Selector.

The problem seems to be even worse if I have more develop settings, such as, Lens Corrections and Basic adjustments set manually or using Auto, but disappears if the Dehaze amount is set to zero.

I have tried turning off the GPU. This still has the significant Loupe lag while moving the WB Selector around the image and LR occasionally goes into “not responding”, but the screen doesn’t go black, although it might black out a portion of the screen.

I’m running Windows 10 Pro 64 Version 1903 and my GPU is NVIDIA GeForce GT 525M with the latest driver ver 391.35 (only has display support, not develop).

I would be interested to know if anyone else experiences this problem.

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Anthony Blackett

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Posted 9 months ago

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Robert Somrak, Champion

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I can duplicate this LARGE delay of the White Balance selector when Dehaze is NonZero on a large Pano.  It doesn't happen when Dehaze is Zero.  In fact it doesn't have to be a large pano, there is some delay on a single photo with Dehaze at NonZero.

This is with full graphics enabled or off.

Lr9.0 macOS 10.14.6
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Rikk Flohr, Official Rep

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Dehaze is very expensive from a computational standpoint. If used in conjunction with a Lens Correction I would expect the lag to be significant. White Balancing is normally done in the first stages of processing to avoid this.

It would be helpful to know what "Serious Lag" really is. Is it 1 second? 10 seconds? 60 seconds?

It would also be helpful to have some system specs including your video card. 
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Robert Somrak, Champion

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On a pano of 27810X3734 the delay of the White Balance slider is 5 seconds or so with Dehaze Nonzero and instant with Dehaze Zero.  On a Canon 5DMk2 photo (non pano) there is a very slight delay with Dehaze NonZero and instant with Dehaze Zero.  Some of the pano issues is probably due to my Graphics card only having 2G of memory on a 27 inch iMac Retina.   

I don't do a lot of large panos so the issue is just an annoyance for me. 

BTW, the increased overall speed improvement in the develop module and Library are welcome additions.  My next machine will have more graphics memory!!!!
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Anthony Blackett

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Hi Rikk,

The Loupe lag can be up to a 20 seconds on my machine with a large pano image when Dehaze is non-zero and other develop settings applied. With Dehaze set to zero, the lag is small, and almost negligible when Lens Correction is off. What is of major concern to me is Lr cycling between normal and 'not responding' with a balck screen (window) while I'm not moving the mouse at all. This condition seems to be very random, sometimes it doesn't do it while other times Lr does it constantly until I manage to set the WB or return the Selector to its dock.

Here is a copy of my System Info:

Lightroom Classic version: 9.0 [ 201910151439-b660523e ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Business Edition
Version: 10.0.18362
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 2.1 GHz
Built-in memory: 16365.8 MB
Real memory available to Lightroom: 16365.8 MB
Real memory used by Lightroom: 1692.2 MB (10.3%)
Virtual memory used by Lightroom: 1886.5 MB
GDI objects count: 661
USER objects count: 2229
Process handles count: 1690
Memory cache size: 586.9MB
Internal Camera Raw version: 12.0 [ 321 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX
Camera Raw virtual memory: 906MB / 8182MB (11%)
Camera Raw real memory: 908MB / 16365MB (5%)
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 1920x1080
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No

Graphics Processor Info:
DirectX: NVIDIA GeForce GT 525M (

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic
Library Path: C:\Users\Tony\Pictures\Lightroom\My LR Photography\My LR Photography-2-2.lrcat
Settings Folder: C:\Users\Tony\AppData\Roaming\Adobe\Lightroom

Installed Plugins:
1) AdobeStock
2) Facebook
3) Flickr
4) Nikon Tether Plugin

Config.lua flags: None

Adapter #1: Vendor : 10de
    Device : dec
    Subsystem : fc501179
    Revision : a1
    Video Memory : 1989
Adapter #2: Vendor : 1414
    Device : 8c
    Subsystem : 0
    Revision : 0
    Video Memory : 0
AudioDeviceIOBlockSize: 1024
AudioDeviceName: S27D590 (NVIDIA High Definition Audio)
AudioDeviceNumberOfChannels: 2
AudioDeviceSampleRate: 48000
Build: 12.1x4
Direct2DEnabled: false
GL_VERSION: 4.6.0 NVIDIA 391.35
GPUDeviceEnabled: false
OGLEnabled: true
GL_EXTENSIONS: GL_AMD_multi_draw_indirect GL_ARB_arrays_of_arrays GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_clip_control GL_ARB_color_buffer_float GL_ARB_compatibility GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_compute_shader GL_ARB_compute_variable_group_size GL_ARB_conditional_render_inverted GL_ARB_copy_buffer GL_ARB_copy_image GL_ARB_cull_distance GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_derivative_control GL_ARB_direct_state_access GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_enhanced_layouts GL_ARB_ES2_compatibility GL_ARB_ES3_compatibility GL_ARB_ES3_1_compatibility GL_ARB_ES3_2_compatibility GL_ARB_explicit_attrib_location GL_ARB_explicit_uniform_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_layer_viewport 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GL_ARB_robustness GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_separate_shader_objects GL_ARB_shader_atomic_counter_ops GL_ARB_shader_atomic_counters GL_ARB_shader_bit_encoding GL_ARB_shader_draw_parameters GL_ARB_shader_group_vote GL_ARB_shader_image_load_store GL_ARB_shader_image_size GL_ARB_shader_objects GL_ARB_shader_precision GL_ARB_shader_storage_buffer_object GL_ARB_shader_subroutine GL_ARB_shader_texture_image_samples GL_ARB_shader_texture_lod GL_ARB_shading_language_100 GL_ARB_shading_language_420pack GL_ARB_shading_language_include GL_ARB_shading_language_packing GL_ARB_shadow GL_ARB_sparse_buffer GL_ARB_sparse_texture GL_ARB_spirv_extensions GL_ARB_stencil_texturing GL_ARB_sync GL_ARB_tessellation_shader GL_ARB_texture_barrier GL_ARB_texture_border_clamp GL_ARB_texture_buffer_object GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_buffer_range GL_ARB_texture_compression GL_ARB_texture_compression_bptc GL_ARB_texture_compression_rgtc 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GL_IBM_rasterpos_clip GL_IBM_texture_mirrored_repeat GL_KHR_context_flush_control GL_KHR_debug GL_KHR_parallel_shader_compile GL_KHR_no_error GL_KHR_robust_buffer_access_behavior GL_KHR_robustness GL_KTX_buffer_region GL_NV_alpha_to_coverage_dither_control GL_NV_bindless_multi_draw_indirect GL_NV_bindless_multi_draw_indirect_count GL_NV_blend_equation_advanced GL_NV_blend_square GL_NV_command_list GL_NV_compute_program5 GL_NV_conditional_render GL_NV_copy_depth_to_color GL_NV_copy_image GL_NV_depth_buffer_float GL_NV_depth_clamp GL_NV_draw_texture GL_NV_ES1_1_compatibility GL_NV_ES3_1_compatibility GL_NV_explicit_multisample GL_NV_fence GL_NV_float_buffer GL_NV_fog_distance GL_NV_fragment_program GL_NV_fragment_program_option GL_NV_fragment_program2 GL_NV_framebuffer_multisample_coverage GL_NV_geometry_shader4 GL_NV_gpu_program4 GL_NV_internalformat_sample_query GL_NV_gpu_program4_1 GL_NV_gpu_program5 GL_NV_gpu_program5_mem_extended GL_NV_gpu_program_fp64 GL_NV_gpu_shader5 GL_NV_half_float GL_NV_light_max_exponent GL_NV_multisample_coverage GL_NV_multisample_filter_hint GL_NV_occlusion_query GL_NV_packed_depth_stencil GL_NV_parameter_buffer_object GL_NV_parameter_buffer_object2 GL_NV_path_rendering GL_NV_pixel_data_range GL_NV_point_sprite GL_NV_primitive_restart GL_NV_query_resource GL_NV_query_resource_tag GL_NV_register_combiners GL_NV_register_combiners2 GL_NV_shader_atomic_counters GL_NV_shader_atomic_float GL_NV_shader_buffer_load GL_NV_shader_storage_buffer_object GL_NV_texgen_reflection GL_NV_texture_barrier GL_NV_texture_compression_vtc GL_NV_texture_env_combine4 GL_NV_texture_multisample GL_NV_texture_rectangle GL_NV_texture_rectangle_compressed GL_NV_texture_shader GL_NV_texture_shader2 GL_NV_texture_shader3 GL_NV_transform_feedback GL_NV_transform_feedback2 GL_NV_uniform_buffer_unified_memory GL_NV_vertex_array_range GL_NV_vertex_array_range2 GL_NV_vertex_attrib_integer_64bit GL_NV_vertex_buffer_unified_memory GL_NV_vertex_program 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Rikk Flohr, Official Rep

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I am testing in a 3440x1440 monitor using an nVidia 970GTX using the 441.12 driver and am seeing about a half-second delay with extreme Dehaze (positive and negative adjustments). With a zero Dehaze setting I am seeing no delay.  While not optimal, it is far better than the 5 and 20 seconds being reported here. 

Do you see the same delay in Adobe Camera Raw?
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Robert Somrak, Champion

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The delay depends on the size of the photo you are working on.  Did you do the test with a LARGE pano?  I only get a small delay on a single RAW file but a significant delay on a large pano as noted in my reply above.

In ACR the RGB numbers update immediately whether Dehaze is Zero or NonZero but ACR does not display the target box like Lr does.  In Lr, the eyedropper moves quickly but the update of the target box takes several seconds
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Rikk Flohr, Official Rep

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I can see a delay of about 2 seconds on my largest pano. 20000 long edge. I am going to bug it. 
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Anthony Blackett

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My example pano is 28508 pixels wide and 4326 px high. ACR is completely different to Lr since it only updates the colour values for the cursor position. The film strip thumbnail doesn't update as the navigator preveiw does in Lr and as Robert has said, there is no 'live' updating Loupe following the Selector around as you move the cursor over the image. So ACR does no image rendering until the image is clicked.

Thanks to you and Robert for testing.