Yeah, Debian has older firmware found in the firmware-amd-graphics
package which doesn’t include the firmware. You’ll need to download it from https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/ I believe anything from linux-firmware-20231030 and newer should work.
20231030 tag: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/amdgpu?h=20231030 or newest(20240410) tag: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/amdgpu?h=20240410
These files need to be placed in /lib/firmware/amdgpu/
As a small homelabber I agree with this. I started with a baremetal and using Docker, and switched to Proxmox, and now over to Incus, actually currently I am using Debian with cockpit + cockpit-machines. I do like Incus, I keep hopping back and forth between cockpit, I need to settle on one.