Turning off auto brightness...

jtdc

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Aug 17, 2008
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As of the moment no way to set the auto brightness to off. Maybe some software update oughta to do it, or some genius gets pissed off and develop one.

I also noticed that when you force off the capacitive button lights (useful when dark) via software, the keyboard light will not turn on also (not useful when dark).
 

jtdc

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Aug 17, 2008
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Edit /etc/hw_config.sh using RootExplorer
1. change the line: i2c_pwm_als with i2c_pwm
2. set permissions to rwxr--r-- (744) if they are changed! VERY IMPORTANT!
3. reboot and enjoy the missing sensor
Nice find schmolch. Will try and update this thread.
 
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Heimiko

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Mar 9, 2005
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I also noticed that when you force off the capacitive button lights (useful when dark) via software, the keyboard light will not turn on also (not useful when dark).
how and where do you do this? is this a setting somewhere? (cant find it)
or do you use 3rd party software? (if so, whats it called?)
 

jtdc

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^ Its an app on the market called "Screen Filter". I use that to further dim the screen (at nights), thereby save battery as well. And its free, as in really free, no ads at all unlike many "free" but has ad pushing. You can turn off the capacitive button lights when you prefer to setup a widget for it.
 
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Smiley76

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Jun 19, 2011
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Nice find schmolch. Will try and update this thread.


Looks like the format has changed in this file.

But this one looks interesting:

echo 1 > $dev/lcd-backlight/als/enable #Sensor on/off. 1 = on, reg 90h

I guess it can be tested "live" by doing:

echo 0 > /sys/devices/i2c-0/0-0040/leds/lcd-backlight/als/enable

I'm on a non-rooted build so I can't test myself :-(
 
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Heimiko

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Mar 9, 2005
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^ Its an app on the market called "Screen Filter". I use that to further dim the screen (at nights), thereby save battery as well. And its free, as in really free, no ads at all unlike many "free" but has ad pushing. You can turn off the capacitive button lights when you prefer to setup a widget for it.
thanks a bunch!

edit: exactly what i was looking for actually!
 
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Heimiko

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Mar 9, 2005
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^ Its an app on the market called "Screen Filter". I use that to further dim the screen (at nights), thereby save battery as well. And its free, as in really free, no ads at all unlike many "free" but has ad pushing. You can turn off the capacitive button lights when you prefer to setup a widget for it.
I found another app, which may actually be better, as it turns off the backlight of the capacitive buttons, but leaves the keyboard backlight active when opened!

it's called "Keyboard backlight controller".

funny enough, this is supposed to disable keyboard backlight, but on the Xperia Mini Pro it disables only the backlights of the soft-keys!

edit: forgot to mention, this app needs root, so may not be for everyone.
 
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Heimiko

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Mar 9, 2005
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Anyone also notice the screen flickers when dimmed?
yes, this is caused by the auto brightness, which can't be turned off in the user interface.
I've played around with hw_config.sh file, trying to get it disabled, but to no avail.
Anyone else more luck?

I've found an application that works, it's called "Disable Auto Brightness".

It was made for another Xperia type phone, but also works on the mini pro (and I assume mini as well).
It works, but its somewhat unhandy: it'll disable the auto brightness sensor, but only after unlocking. so while using the stock lock screen, it works almost perfectly, but when using something like widgetlocker, it'll only work if you leave the system keyguard enabled (under advanced settings) which I don't really like too much.

so for anyone having these flicker issues, this is a fairly good solution.
but I'd like to have the sensor completely turned off.
soooo, anyone any luck with that?
 

Smiley76

Senior Member
Jun 19, 2011
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yes, this is caused by the auto brightness, which can't be turned off in the user interface.
I've played around with hw_config.sh file, trying to get it disabled, but to no avail.
Anyone else more luck?

I've found an application that works, it's called "Disable Auto Brightness".

It was made for another Xperia type phone, but also works on the mini pro (and I assume mini as well).
It works, but its somewhat unhandy: it'll disable the auto brightness sensor, but only after unlocking. so while using the stock lock screen, it works almost perfectly, but when using something like widgetlocker, it'll only work if you leave the system keyguard enabled (under advanced settings) which I don't really like too much.

so for anyone having these flicker issues, this is a fairly good solution.
but I'd like to have the sensor completely turned off.
soooo, anyone any luck with that?
I guess that means the echo 0 to lcd-backlight/als/enable thing I posted a few days ago didn't work?
 

scroolik

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Feb 23, 2011
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Looks like the format has changed in this file.

But this one looks interesting:

echo 1 > $dev/lcd-backlight/als/enable #Sensor on/off. 1 = on, reg 90h

I guess it can be tested "live" by doing:

echo 0 > /sys/devices/i2c-0/0-0040/leds/lcd-backlight/als/enable

I'm on a non-rooted build so I can't test myself :-(
This works on my SK17i (Xperia mini pro). See here for more info.
 
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