I don't know much about AMD GPUs but from what I've seen there is usually only one kernel graphics driver that works for a given GPU.
After you have switched back to a 'stock' config and kernel, what does vulkaninfo report? Does the "bad performance" persist?
I don't know much about AMD GPUs but from what I've seen there is usually only one kernel graphics driver that works for a given GPU.
After you have switched back to a 'stock' config and kernel, what does vulkaninfo report? Does the "bad performance" persist?