MobileRead Forums - View Single Post - Forma How can I make my Forma auto power off after 24 hours of no taps or button presses?

Frenzie · 09-05-2019, 11:04 AM

Good news, I figured it out. The Kobo Aura H2O wakes up at the time of the alarm set through a relevant ioctl RTC_WKALM_SET call.

You can test this, for example, by using:

Code:

rtcwake -m on -s 300

And then suspending.

The key is that if rtcwake tries to perform a suspend-related action it detects that it can't, but if you just set the alarm the device will wake up from suspend at the specified time.

So I'm going to go with likely standard, but still kind of weird? Because the /sys/class/rtc/rtc0/wakealarm method is just a convenient way to do the same thing without having to compile a program.

09-05-2019, 11:04 AM	#22
Frenzie Wizard Posts: 1,758 Karma: 730681 Join Date: Oct 2014 Location: Antwerp Device: Kobo Aura H2O	Good news, I figured it out. The Kobo Aura H2O wakes up at the time of the alarm set through a relevant ioctl RTC_WKALM_SET call. You can test this, for example, by using: Code: rtcwake -m on -s 300 And then suspending. The key is that if rtcwake tries to perform a suspend-related action it detects that it can't, but if you just set the alarm the device will wake up from suspend at the specified time. So I'm going to go with likely standard, but still kind of weird? Because the /sys/class/rtc/rtc0/wakealarm method is just a convenient way to do the same thing without having to compile a program.