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How to - Mimic the Nokia N9's LowPowerMode screen

asked 2017-06-06 19:40:44 +0300

Edz gravatar image

updated 2017-06-06 19:43:02 +0300

The Nokia N9 has a different type of screen compared to the Jolla devices. the N9 uses AMOLED, while Jolla uses IPS-LCD. AMOLED can turn on/off individual pixels, where the IPS-LCD lights the entire screen just to illuminate one pixel - the pixel may be white on a black background, but the IPS LCD is colouring the black background, unlike the AMOLED where the black background is because NO pixels are lit and is more energy efficient as a result.

So, think of the 'glance screen' (lpm screen) on Jolla1 as a screenshot of the time/date, meaning that the time/date will not update in real time when viewing it, it is not until the sensor is covered/uncovered/pulled from pocket/hovered-over, that the time & date will then update.

I've made a DEMO patch to quench the thirst of those gagging for a live LPM (fake low power mode) screen - for now, this only displays the time and date in real time.

First off, you may want to install Sneak Peek patch from coderus, found on openrepos. Also, mcetool (mce-tools) is required for this patch to work, but don't worry if it is not installed on your device, my patch will install it for you. This patch also automagically changes the lpm timeout period to 1 hour upon installation, the default timeout is 5 seconds. The timeout will be defaulted to 5 seconds when my patch is uninstalled.

Ultimately, what you end up seeing, is not a LOW POWER MODE SCREEN of ANY DESCRIPTION, far from it, as this will KICK THE LIVING DAYLIGHTS out of your battery if you continually choose to display the time/date, using it like a bedside clock - it's not meant to be used as a timepiece.

I know it is a battery kicker, because I have tested it out. I lost 39% of my battery over night (6 hour period) running the fake LPM screen continuously, so you have been warned.

IF you are going to use my patch, please make sure you unapply any patches that affect the lockscreen clock, for example, any of Ancelad's Clock patches. Once unapplied, make sure you restart services in patchmanager if applicable. Then install and apply my patch - restart services and enjoy.

For now, the patch can be found here on my Openrepos account; https://openrepos.net/sites/default/files/packages/1290/sailfishos-patch-mimic-n9-lpm-screen-0.1-1.noarch.rpm

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I am wondering if it is possible to show something on the LCD while the backlight is off? That could be readable at least in good light. Of cause, our IPS is far from being a special transflexive display, but may be better than nothing. Apart from date & time, I am dreaming of wheather forecast, notifications, and RSS feeds diplayed full-time. Things that I have been missing since switching from Symbian to Sailfish...

ziellos ( 2017-06-06 21:03:03 +0300 )edit

now how good that phone (N9) actually was! and wait....already 6 years ago!

t0mps0 ( 2017-06-06 21:36:20 +0300 )edit

2 Answers

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answered 2017-06-06 20:36:46 +0300

Is there any ported devices with low power mode supported AMOLED out there? It might also makes sense for them too.

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Oneplus X has an AMOLED screen :)

Dylan Van Assche ( 2017-06-06 21:25:04 +0300 )edit

answered 2017-06-07 08:37:32 +0300

jdrescher2006 gravatar image

This is really cool for AMOLED devices such as the Oneplus X. On XDA someone has already made a quick and dirty solution to have LPM updated every minute.
@fmotl: please make this app open source and bring it to github. Others (e.g. me) might like to participate in developing...

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Asked: 2017-06-06 19:40:44 +0300

Seen: 559 times

Last updated: Jun 07 '17