Summary
UE 5.8.2 Linux + AMD RADV (RDNA2, RX 6700): Lit viewport, Shader Editor and
Animation Editor render completely black, correlating with amdgpu MODE1 GPU
resets in dmesg. Unlit rendering works fine. Behavior changes with -sm5.
What Type of Bug are you experiencing?
Editor
Steps to Reproduce
Steps to Reproduce
The issue started spontaneously one day (no engine update, driver update,
or project change consciously made beforehand) and has been persistent
and 100% reproducible since.
- Launch UnrealEditor (5.8.2, Vulkan RHI, SM6) on Linux/RADV
- Open any project and switch a viewport to Lit view mode
→ Viewport renders completely black - Open the Material Editor / Shader Editor on any material
→ Preview renders completely black - Open the Animation Editor / Persona on any skeletal mesh
→ Viewport renders completely black - Switch the same viewport to Unlit view mode
→ Renders correctly
Occurs on every project tested, not limited to one asset/level, suggesting
a Vulkan/RHI-level issue rather than corrupted content.
Correlates with GPU resets visible in dmesg:
amdgpu 0000:2d:00.0: MODE1 reset
amdgpu 0000:2d:00.0: GPU mode1 reset
amdgpu 0000:2d:00.0: GPU smu mode1 reset
Launching with -sm5 changes the behavior (see notes).
Expected Result
Expected Result
The Lit viewport, Material/Shader Editor preview, and Animation Editor
viewport should render the scene/material/skeletal mesh normally with
lighting applied, the same as Unlit rendering currently does correctly.
Observed Result
Observed Result
Lit viewport, Shader Editor (Material Editor preview), and Animation
Editor / animation-related viewports render completely black. Unlit
rendering works correctly. The issue is not limited to a specific
material, asset, or level — it reproduces across different projects
and editor areas, and is 100% reproducible since it first appeared.
Correlates with GPU resets in dmesg:
amdgpu 0000:2d:00.0: MODE1 reset
amdgpu 0000:2d:00.0: GPU mode1 reset
amdgpu 0000:2d:00.0: GPU smu mode1 reset
Behavior changes when launching with -sm5 (SM5 opens, with an interface
warning that SM5 is not fully compatible).
Affects Versions
5.8
Platform(s)
Linux
