thinkpad_acpi ignores writes to /proc/acpi/ibm/fan unless loaded
with fan_control=1. Enable it so the fan can be set to a level (0-7)
or full-speed by hand; the firmware stays in charge while the level
is "auto". Applies from the next boot or a reload of the module.
Assisted-by: Claude:opus-5
acpi.ec_no_wakeup=1 stops EC interrupts from thrashing s2idle, and a
dconf system-db override disables gsd-power's sleep handlers so logind
owns all sleep/idle policy (gsd was re-waking before HibernateDelaySec).
Split lid/suspend policy by power source (s-t-h on battery, plain suspend
on AC), map power key to hibernate, drop HibernateDelaySec to 15min while
re-validating thermals, and disable USB-device wakeup via udev.
