The Mac's Asahi GPU exposes no busy counter, clock, sensor or memory reading, so
its box was a graph that could never draw beside a column of dashes. A GPU with
nothing to read now gets one line (driver, "nothing measurable" or the stall,
and whether a process has it open), its row shrinks to fit, and the Gpu% column
and gpu sort are dropped when no GPU on the machine can light them. QoL #3 from
bug bash 6 (BUGS.md).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>