Preventing ChromeOS from blanking the screen when working on a different tty

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http://unix.stackexchange.com – I am running Archlinux in a chroot alongside Chrome OS on a chromebook. The original project is there, my fork of it is here (mostly similar). The issue is that the display power management of Chrome OS only takes touchpad and keyboard input made in Chrome OS's X on tty1 into account to reset the screen blanking countdown. So, if I am working in my chroot, on tty3 (console) or on tty4 (Arch's own X server), the backlight turns off after 5 minutes, whether I am idle or active. I have to then come back to tty1 to register some input there and get powerd to reactivate the backlight. I don't wa (HowTos)