BT_GLASS is a compile-time #ifdef; getenv("BT_GLASS") appears nowhere in the
tree. The line rode along from the bring-up launcher into the frozen profile
and into the pod-hardware runbook, reading like the switch that turns the
glass path on. It never did anything -- the rig worked because glass is the
DEFAULT profile when nothing is set.
Replaced with BT_PLATFORM=glass (the real spelling, so the cart does not lean
on that default) and noted why NOT BT_PLATFORM=pod: the pod profile selects
the 1995 multi-surface gauge path, which needs the NVIDIA horizontal span no
modern driver has. Behaviourally identical -- both land gBTPlatformGlass=1.
Re-verified on the cart: 9 settings applied, GLASS profile, -fit borderless,
all three surfaces on their intended displays.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Rw7No5wLTpkaUgA3ANbtZZ
