RDP connection causes driver crash in command recording using mesh shader pipeline including a task stage

[Ipotrick]

When i have RDP open and launch an app that attempts to record a draw command (vkCmdDrawMeshTasksIndirectEXT) with a bound pipeline containing a task shader, i get a crash within the driver.
Note that i do not have any of the rdp capture features such as crash recovery or profiling enabled.
Repro rate 100%.
It does NOT crash with RDP not attached.
The shader and renderer perform normally with RDP not attached.
There are no vulkan validation errors.
I also tested on a RTX4080 and it also exhibits no issues with the code.
Considering what i see i assume this could be a driver bug related to rdp and specifically using task shaders

==========================================
Host System Information

RDP Version: Radeon Developer Panel v3.4.1.8
RDP build Date: 12/04/2025

Operating System: Windows 11 Version 25H2
Qt Version: 6.7.0

Tool Version:
Router Version 0.13.0

==========================================
Connected System Information

Driver Version: 25.20.29.09-251203a-196284C-AMD-Software-Adrenalin-Edition
GPUOpen Interface Major Version: 42

Operating System Name: Windows 11 Home
Operating System Description: 26100.1.amd64fre.ge_release.240331-1435

GPUs:

---

Name: AMD Radeon RX 9070 XT

ASIC info

---

Device Id: 7550
Revision: C0
Family: 98
gfx_engine: 13

[MattGuerrette]

@Ipotrick Is there a reproducible sample app you could share or point to so that I can debug this on the driver side?

[Ipotrick]

Hi.
Sorry for the late reply.
I was trying to make a repro by cutting down my app where it occures but i havent had success in replicating it in a small sample yet.
I will try that now again.

[Ipotrick]

I found why i could not reproduce it before, i now added a small repro within the tests of the graphics api library i use:
https://github.com/Ipotrick/Daxa
The mesh shader sample uses task shaders and it causes the crash.
Notable it only crashes when rdp is open with the crash analysis enabled.
It works completely normally when rdp is not attached.

[Ipotrick]

Notable things:

• It crashes even when all entry points are made blank within the shader.
• It crashes with a normal, non-indirect, dispatch, even when the dimensions are 0,0,0
• The multisampling in that test is irrelevant, i disabled it fully and the behavior stays the same
• I also replaced the slang shader with empty glsl shaders just in case slang has more bugs but that also not fix it

[Ipotrick]

Actually, i just saw that Sasha Willems has mesh shader samples.
The crash within rdp reproduces in his sample as well:
https://github.com/SaschaWillems/Vulkan/tree/master

[Ipotrick]

I am now quite convinced that this will happen for any vulkan app that tries to record commands with a pipeline that has a task stage with rdp attached.