Issues with Rhino 8 and hybrid GPU config

[software7 (Software)]

Hi all,

After scouring the forums and trying all possible solutions I could find independently with no success, I need to request assistance for this one. The issue is with an installation of Rhino 8 Version 8 SR28 (8.28.26041.11001, 2026-02-10) where it is freezing for an unusual length of time (>30 minutes) upon saving a file or deleting an object within a project.

SystemInfo below:

Rhino 8 SR28 2026-2-10 (Rhino 8, 8.28.26041.11001, Git hash:master @ b7874a05a6982d0419fcc4f6009b510b48a09cb3)

Windows 11 (10.0.26200 SR0.0) or greater (Physical RAM: 63GB)

.NET 8.0.24

Computer platform: LAPTOP - Plugged in [80% battery remaining]

Hybrid graphics configuration.

Primary display: Intel(R) Arc™ Pro 140T GPU (32GB) (Intel) Memory: 2GB, Driver date: 5-25-2025 (M-D-Y).

> Integrated graphics device with 4 adapter port(s)

    - Windows Main Display is laptop's integrated screen or built-in port

Primary OpenGL: NVIDIA RTX PRO 2000 Blackwell Generation Laptop GPU (NVidia) Memory: 8GB, Driver date: 2-27-2026 (M-D-Y). OpenGL Ver: 4.6.0 NVIDIA 595.71

> Integrated accelerated graphics device with 1 adapter port(s)

    - Secondary monitor is laptop's integrated screen or built-in port

OpenGL Settings

Safe mode: Off

Use accelerated hardware modes: On

GPU Tessellation is: Off

Redraw scene when viewports are exposed: On

Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x

Mip Map Filtering: Linear

Anisotropic Filtering Mode: High

Vendor Name: NVIDIA Corporation

Render version: 4.6

Shading Language: 4.60 NVIDIA

Driver Date: 2-27-2026

Driver Version: 32.0.15.9571

Maximum Texture size: 32768 x 32768

Z-Buffer depth: 24 bits

Maximum Viewport size: 32768 x 32768

Total Video Memory: 8151 MB

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino

C:\Program Files\Rhino 8\Plug-ins\Commands.rhp “Commands” 8.28.26041.11001

C:\Program Files\Rhino 8\Plug-ins\rdk.rhp “Renderer Development Kit”

C:\Program Files\Rhino 8\Plug-ins\RhinoRenderCycles.rhp “Rhino Render” 8.28.26041.11001

C:\Program Files\Rhino 8\Plug-ins\RhinoRender.rhp “Legacy Rhino Render”

C:\Program Files\Rhino 8\Plug-ins\rdk_etoui.rhp “RDK_EtoUI” 8.28.26041.11001

C:\Program Files\Rhino 8\Plug-ins\NamedSnapshots.rhp “Snapshots”

C:\Program Files\Rhino 8\Plug-ins\MeshCommands.rhp “MeshCommands” 8.28.26041.11001

C:\Program Files\Rhino 8\Plug-ins\RhinoCycles.rhp “RhinoCycles” 8.28.26041.11001

C:\Program Files\Rhino 8\Plug-ins\Toolbars\Toolbars.rhp “Toolbars” 8.28.26041.11001

C:\Program Files\Rhino 8\Plug-ins\3dxrhino.rhp “3Dconnexion 3D Mouse”

C:\Program Files\Rhino 8\Plug-ins\Displacement.rhp “Displacement”

C:\Program Files\Rhino 8\Plug-ins\SectionTools.rhp “SectionTools”

Steps taken so far:

• Ensured Rhino was added and set to dGPU in Display > Graphics

• Ensured OpenGL settings within Rhino were set correctly as per Rhino 8 randomly freezes while doing nothing out of the ordinary - #11 by Japhy and Soooo, you bought a laptop with hybrid graphics and rhino doesn’t run right. READ THIS - Rhino / Windows Hardware - McNeel Forum

• Updated Nvidia drivers to latest 595.71version (had 2025 version installed)

• Verified power settings were set to Max Performance in Windows and NVIDIA Control Panel

• Ran nvidia-smi in CMD; Rhino appeared in the process list, confirming correct GPU is being used

• Ensured all latest Windows and manufacturer updates are installed

• Confirmed no 3rd party plugins are in use

• Projects files are being opened from, and saved back to, a local folder on C:\. Have even tested moving files to a second on-board SSD with no change to behaviour

Does anyone have any further suggestions or similar experiences with this particular CPU/GPU/iGPU combo and using Rhino8?

[wim (Wim Dekeyser)]

Hi software -

@software7

The issue is with an installation of Rhino 8 Version 8 SR28 (8.28.26041.11001, 2026-02-10) where it is freezing for an unusual length of time (>30 minutes) upon saving a file or deleting an object within a project.

Is this specific to a certain file or can you also see this behavior in a new file from a factory-default template?
-wim

[JimCarruthers]

That’s not a GPU thing, it’s some kind of a Rhino bug.

If you can find a file where it happens reliably they may be able to figure it out.

[software7 (Software)]

We’ve tested with a variety of files, that other people are also able to work with with no issues and have not been able to replicate the same issue for anyone else, only on this particular workstation.

[theoutside (Kyle Houchens)]

is there a reason you have gpu tessellation off?

OpenGL Settings

Safe mode: Off

Use accelerated hardware modes: On

GPU Tessellation is: Off

Redraw scene when viewports are exposed: On

Graphics level being used: OpenGL 4.6 (primary GPU’s maximum)

Anti-alias mode: 4x

Mip Map Filtering: Linear

[software7 (Software)]

Hi Kyle,

We have tested disabling this feature as per a suggestion on the linked article - Rhino 8 randomly freezes while doing nothing out of the ordinary - #11 by Japhy

We are seeing the same behaviour however whether this setting is enabled or disabled.

[wim (Wim Dekeyser)]

Hi software -

@software7

We’ve tested with a variety of files, that other people are also able to work with with no issues and have not been able to replicate the same issue for anyone else, only on this particular workstation.

Did this use to work as expected on this workstation at some point in the past?
Have you tried the Reset command to revert Rhino to the factory defaults?
-wim

[software7 (Software)]

Hi Wim,

No this issue has been present since moving to this new device.

This was previously in use on another device and is used by others in the company with no issues.

I’ve now uploaded a procmon log file to Rhino, hoping they can offer some assistance or suggestions.