== DF-2394 baseline (ACHARNESS #3, uid=1001 unprivileged) ==
UID=1001
33554416  <- hw.acpi.toshiba.force_fan      (0x02000050)
0         <- hw.acpi.toshiba.video_output
524287    <- hw.acpi.toshiba.lcd_brightness (0x7FFFF)
-2048     <- hw.acpi.toshiba.lcd_backlight  (0xFFFFF800)
524287    <- hw.acpi.toshiba.cpu_speed
(x5 identical rounds; GHCI CX is a String -> *arg never written by hci_call
 while it reports success -- pure kernel-stack residue)