Freeze when initializing EEVEE on RX 580 #56789

New Issue

Robert Hewitt · 2018-09-13T06:27:23+02:00

Robert Hewitt commented

2018-09-13 06:27:23 +02:00

System Information
Windows 10 and RX 580 with Radeon Adrenalin driver 18.8.2 (latest "optional" driver at time of posting)

Blender Version
blender-2.80-f04ddd37ea3-win64

Short description of error
When switching to Rendered Mode (SHIFT + Z) in the EEVEE engine, the application becomes unresponsive while generating mipmaps for a depth texture.

Exact steps for others to reproduce the error

Switch to Rendered View

I built from source using the latest version, and I was able to stack-trace where the application busy-waits. The freeze occurs in the file gpu_texture.c in the method GPU_texture_generate_mipmap where it calls glGenerateMipmap. This may be because glGenerateMipmap on a GPU_DEPTH_COMPONENT24 texture is not officially supported on AMD drivers.

Note:
I saw a line in eevee_effects.c in the function EEVEE_effects_init that falls back to an R32F texture for intel gpus, and tried changing the code so that my GPU is also included in the workaround and this appears to fix the error. (However, as an OpenGL developer myself, I would recommend manually generating mipmaps for the depth texture instead of using glGenerateMipmaps as it makes no sense to linearly interpolate depth values.)

**System Information** Windows 10 and RX 580 with Radeon Adrenalin driver 18.8.2 (latest "optional" driver at time of posting) **Blender Version** blender-2.80-f04ddd37ea3-win64 **Short description of error** When switching to Rendered Mode (SHIFT + Z) in the EEVEE engine, the application becomes unresponsive while generating mipmaps for a depth texture. **Exact steps for others to reproduce the error** * Switch to Rendered View I built from source using the latest version, and I was able to stack-trace where the application busy-waits. The freeze occurs in the file `gpu_texture.c` in the method `GPU_texture_generate_mipmap` where it calls `glGenerateMipmap`. This may be because `glGenerateMipmap` on a `GPU_DEPTH_COMPONENT24` texture is not officially supported on AMD drivers. Note: I saw a line in `eevee_effects.c` in the function `EEVEE_effects_init` that falls back to an `R32F` texture for intel gpus, and tried changing the code so that my GPU is also included in the workaround and this appears to fix the error. (However, as an OpenGL developer myself, I would recommend manually generating mipmaps for the depth texture instead of using glGenerateMipmaps as it makes no sense to linearly interpolate depth values.)

Robert Hewitt commented

2018-09-13 06:27:23 +02:00

Added subscriber: @rhewitt