The guard reads the driver's own display verdict (an IORegistry property, NullMoth's nvrm-boot-hold by default):
a staged boot whose display did not arm by login rolls back at once instead of waiting out the window, and a
rollback boot without an armed display is failed-after-rollback, not a pass. Loaded kexts alone used to count as
good, which missed a desktop running on software rendering. HOLD_SERVICE, HOLD_PROP, HOLD_ARMED in the config.
The captures include the driver service's string properties (driver-props.txt).
0.1.0 (2026-10-19)
First public release. stage.sh records a staged driver boot; the org.watchthelight.gpu-guard LaunchDaemon waits for login, captures the driver state, asks for a Good (dialog or gpu-guard-ok) and, without one, installs the recovery package and restarts once.
Settings in /usr/local/etc/gpu-guard.conf; defaults fit NullMoth's NVIDIA Metal driver.
Dry run mode (GPU_GUARD_DRY=1) that never touches the real attempt.