Screen and processor activity

[Vava]

Hi,
I would like to know how I can shut off the screen and lower the processor activity within a script. And I don't want to put the Kindle in standby mode. I looked at the LIPC commands but without finding the right parameters
Thanks for your advices !

[ixtab]

Originally Posted by Vava

Hi,
I would like to know how I can shut off the screen and lower the processor activity within a script. And I don't want to put the Kindle in standby mode. I looked at the LIPC commands but without finding the right parameters
Thanks for your advices !

There is no need to "shut off" an e-ink screen. It is essentially shut down all the time, and only consumes power when it is being re-drawn (i.e., changed).

EDIT: Concerning the Paperwhite light, see this thread for inspiration.

[knc1]

Originally Posted by Vava

Hi,
I would like to know how I can shut off the screen and lower the processor activity within a script. And I don't want to put the Kindle in standby mode. I looked at the LIPC commands but without finding the right parameters
Thanks for your advices !

A general description, with links to training materials:
http://free-electrons.com/services/power-management/

Please share what you learn with this forum.

[knc1]

And while you are learning about this topic -
Investigate this part of the system device tree:

[root@kindle driver]# ls -l /sys/devices/platform/mxc_rtc.0/
lrwxrwxrwx    1 root     root             0 May 25 07:10 driver -> ../../../bus/platform/drivers/mxc_rtc
-r--r--r--    1 root     root          4096 Jun  2 14:56 modalias
drwxr-xr-x    2 root     root             0 Jun  2 14:56 power
drwxr-xr-x    3 root     root             0 May 25 07:10 rtc
-rw-rw-rw-    1 root     root          4096 Jun  2 14:56 rtc_pmic_epoch_time
-rw-rw-rw-    1 root     root          4096 Jun  2 14:56 rtc_saved_last_seconds
lrwxrwxrwx    1 root     root             0 May 25 07:10 subsystem -> ../../../bus/platform
-rw-r--r--    1 root     root          4096 May 25 07:10 uevent
-rw-r--r--    1 root     root          4096 Jun  2 14:56 wakeup_enable
-rw-r--r--    1 root     root          4096 Jun  2 14:56 wakeup_from_halt

It at least has interesting names.
You may have to read some of the driver source code to find out about those.