Bloom plugin broken on AMD GPU

[yhutter]

I am running Ubuntu 20.04LTS with AMD proprietary graphics driver and a AMD Raedon RX 6800 GPU. However when running any example (e.g Material Demo) I get a really bright white screen and some flickering rectangles. I narrowed it down to the bloom plugin. When I disable the bloom plugin in the plugins.yaml file everything works fine. I also do not get an error message etc.

Here would be my console output for reference

[>] CORE                      Using panda3d-supplied core module 
[>] RenderPipeline            Using Python 3.8 with architecture linux_amd64 
[>] RenderPipeline            Using Panda3D 1.10.9 built on Mar 26 2021 09:46:47 
[>] RenderPipeline            Using git commit aac27409cfe3a608c1edf028af19b59d08ddc7f4 
[>] MountManager              Auto-Detected base path to /home/yahart/Data/GitRepos/render_pipeline 
[>] RenderPipeline            Mount manager was not mounted, mounting now ... 
[>] MountManager              Setting up virtual filesystem 
[>] MountManager              Mounting auto-detected config dir: /home/yahart/Data/GitRepos/render_pipeline/config/ 
[>] MountManager              Mounting ramdisk as /$$rptemp 
[>] RenderPipeline            No settings loaded, loading from default location 
Known pipe types:
  glxGraphicsPipe
(1 aux display modules not yet loaded.)
[>] RenderPipeline            Driver Version = 4.6 (Core Profile) Mesa 20.3.4 
[>] RenderPipeline            Driver Vendor = AMD 
[>] RenderPipeline            Driver Renderer = AMD Radeon RX 6800 (SIENNA_CICHLID, DRM 3.40.0, 5.8.0-50-generic, LLVM 11.0.1) 
[>] RenderPipeline            Render resolution is 800 x 600 
[>] LightManager              Tile size = 24 x 16 , Num tiles = 34 x 38 
[>] GPUCommandQueue           Allocating command buffer of size 32768 
[>] GroupedInputBlock         Native UBO support = False 
[!] RPLoader                  Loading '/$$rp/data/default_cubemap/cubemap.txo' took 104.57 ms
[>] PluginManager             Loading plugin settings 
[>] PluginManager             Creating plugin instances .. 
[>] Debugger                  Creating debugger 
[>] StageManager              Setup stages .. 
[>] StageManager              Preparing stages .. 
[>] AOStage                   Blur quality is MEDIUM 
[>] StageManager              Awaiting future pipe Exposure 
[>] UpdatePreviousPipesStage  Creating previous pipes stage .. 
[>] StageManager              Writing shader config 
[>] RenderPipeline            Finished initialization in 0.700 s, first frame: 3 
[>] RenderPipeline            Took 1.439 s until first frame 
[>] RenderPipeline            Hiding loading screen after 10 pre-rendered frames. 

If there is any more information I can provide please let me know. I would love to use this awesome graphics pipeline in my next project but I am currently blocked by #124, #105 and this one.