Put screen to sleep

[xse]

Hi @all

We are trying to put the screen of a MKIII / M82 device to sleep (so that the connected screen goes into power saving mode)
We have tried several methods but none of them really work; Here are the most promising ones:

1) Disable HDMI

echo -n "VIC:0" > /sys/devices/virtual/amhdmitx/amhdmitx0/disp_mode

Would work great, but for some reason after some seconds the screen turns on again. We have tried to disable HDMI auto detection, its still the same issue. Looks like somewhere there is a watchdog that turns on the HDMI output again. Any ideas how to prevent that?

2) Android Power Manager
We put the device to sleep but keep a partial wake lock. This works as expected, but has the problem that android kills application that keep a wake lock for too long, and then the device completely falls into sleep

Any ideas or suggestion are appreciated

[Addyhash]

Hi @all

We are trying to put the screen of a MKIII / M82 device to sleep (so that the connected screen goes into power saving mode)
We have tried several methods but none of them really work; Here are the most promising ones:

1) Disable HDMI

echo -n "VIC:0" > /sys/devices/virtual/amhdmitx/amhdmitx0/disp_mode

Would work great, but for some reason after some seconds the screen turns on again. We have tried to disable HDMI auto detection, its still the same issue. Looks like somewhere there is a watchdog that turns on the HDMI output again. Any ideas how to prevent that?

2) Android Power Manager
We put the device to sleep but keep a partial wake lock. This works as expected, but has the problem that android kills application that keep a wake lock for too long, and then the device completely falls into sleep

Any ideas or suggestion are appreciated

using a root explorer, navigate to the folder that stores the 3 screen saver images and replace them with black screens... set screen saver to 4 mins ... it wont turn screen off, but it will at least be black.