Firstly, the kernel does boots up in case of power-of charge. Its booted in a special mode (maybe with different .rc file) such that only the charging related process is spawned up (but kernel and drivers are loaded).
Secondly, the power-off wake up can be done by RTC clock. As a RTC clock is only h/w that is awake after power off or android deep sleep stage, other area which is powered is of course the power button area. This RTC clock is h/w dependent. But i assume most Soc support it. To do a quick self test without installing any app .. 1)You can look for a dev node like /dev/rtc0 or rtc1 in adb shell... 2) By doing echo on the relevant dev/rtc node, the no. of seconds in future you can set a RTC alarm which CAN (not must) power on the device. 3) Switch off the device after the echo command. Note :May not work , depending on hardware implementation Referer below link for syntax and other info : https://www.linux.com/learn/docs/672849-wake-up-linux-with-an-rtc-alarm-clock Regards, Anirudh On Tuesday, February 14, 2012 5:41:17 PM UTC+5:30, Levi Ribeiro wrote: > > I'm using an Android tablet (a Coby Kyros MID 7016) for an application > where I'd like the device to power on without using the power on > button, via usb or setting an alarm. > > I've already tried installing some app, setting an alarm, turning off > the device, and the device does not power on. > That tablet doesn't charge via USB. > > So i think its something on the kernel, some hack that could fix this. > > A bit of Googling revealed that I could modify the executable /system/ > bin/playlpm, but my device don't have this file (when I plug my device > in charger it doesn't show any image on the screen, theres just a led > to indicate when the device is full charged). > > Anyone know how to improve this? > > Thanks in advance! -- -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel --- You received this message because you are subscribed to the Google Groups "Android Linux Kernel Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-kernel+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
