Disable front light completely?

evanft · 05-07-2016, 01:38 PM

Is there a way to completely disable the front light on the KV? I'm coming from a K4NT and I'm getting eye strain even with the light at the lowest setting.

I'm already jailbroken on FW 5.6.5.

HarryT · 05-07-2016, 02:02 PM

Presumably you're reading in low light if you have the frontlight on its lowest level. Won't turning it off completely cause even more eye strain? The screen will be more difficult to read without any light!

evanft · 05-07-2016, 03:31 PM

Quote:

Originally Posted by HarryT

Presumably you're reading in low light if you have the frontlight on its lowest level. Won't turning it off completely cause even more eye strain? The screen will be more difficult to read without any light!

Having the light on any level hurts my eyes, period. I want it off completely.

knc1 · 05-07-2016, 04:01 PM

Quote:

Originally Posted by evanft

Having the light on any level hurts my eyes, period. I want it off completely.

trade it in on a model without a front light

evanft · 05-07-2016, 04:05 PM

Quote:

Originally Posted by knc1

trade it in on a model without a front light

That seems the best course of action. I'm just going to keep my K4NT.

Barbara1955 · 05-07-2016, 04:14 PM

I get eye strain at the Lowest setting even in Bright sunlight. My eyes more comfortable hat higher settings. Try increasing the light see what happens.

eschwartz · 05-08-2016, 05:35 PM

Since you are jailbroken, you should be able to disable the frontlight using peterson's Front Light Master extension.

(It is possible the method used to control the frontlight needs to be updated for KV compatibility. Either way, the current extension should certainly give you an idea of what might need doing.)

geekmaster · 05-09-2016, 10:56 AM

You can turn it off completely with a KUAL script (not written yet AFAIK). I was turning off the LED from root shell over SSH on my PW1 back before I lost it on a trip. I have a functional PW3 now, so I can explore making such a KUAL extension...

Hmm... I just realized I can probably modulate (baseband AM, or at least PWM) the backlight for audio output for my kindle video player. A photocell connected to amplified speakers should work for that. I may need to build a kernel module for such add-on audio support for mute kindles like the paperwhite (or K4 with modulated power LED) models.

eschwartz · 05-09-2016, 11:38 AM

@geekmaster,

Like I said, peterson already made one.
As I don't own any frontlit Kindle, I don't know whether they all share the same sysfs controls or need to be updated for different models.

Yourcat · 05-12-2016, 02:57 PM

The orange and green LEDs would may stereo "playback" if you enjoy PWM.

Yourcat · 05-12-2016, 03:07 PM

With usbnet you may check whether https://www.mobileread.com/forums/sho...68&postcount=4 works for the KV.
Adding this to the suspend or wake-up event script should be acceptable instead of a Kual menu. Starting reading one may need to increase/change the brightness anyway.

knc1 · 05-12-2016, 07:40 PM

Quote:

Originally Posted by Yourcat

With usbnet you may check whether https://www.mobileread.com/forums/sho...68&postcount=4 works for the KV.
Adding this to the suspend or wake-up event script should be acceptable instead of a Kual menu. Starting reading one may need to increase/change the brightness anyway.

The pathname may have changed if running 5.7.x but all 5.6.x should have the same as shown.

NiLuJe · 05-12-2016, 08:26 PM

AFAIR, we're successfully using that path in KOReader for the whole Wario range

.
And I can attest that it still holds true on my PW2 on 5.7.x.

knc1 · 05-12-2016, 09:30 PM

Quote:

Originally Posted by NiLuJe

AFAIR, we're successfully using that path in KOReader for the whole Wario range

.
And I can attest that it still holds true on my PW2 on 5.7.x.

The /sys tree is **supposed to be** a stable interface (for a kernel Major.Minor version series).

But those provided by modules outside of the mainstream Kernel (think: Amazon/Lab126 authored) might not reach that goal.

So I was just being careful with my 'check it before using it' advice.

AnimalOfArt · 07-12-2017, 08:15 AM

Quote:

Originally Posted by eschwartz

Since you are jailbroken, you should be able to disable the frontlight using peterson's Front Light Master extension.

(It is possible the method used to control the frontlight needs to be updated for KV compatibility. Either way, the current extension should certainly give you an idea of what might need doing.)

I used the extension as it is on KV and it works!

05-07-2016, 01:38 PM	#1
evanft Zealot Posts: 108 Karma: 695156 Join Date: Apr 2013 Device: Kindle 4 NT	Disable front light completely? Is there a way to completely disable the front light on the KV? I'm coming from a K4NT and I'm getting eye strain even with the light at the lowest setting. I'm already jailbroken on FW 5.6.5.

05-09-2016, 10:56 AM	#8
geekmaster Carpe diem, c'est la vie. Posts: 6,433 Karma: 10773668 Join Date: Nov 2011 Location: Multiverse 6627A Device: K1 to PW3	You can turn it off completely with a KUAL script (not written yet AFAIK). I was turning off the LED from root shell over SSH on my PW1 back before I lost it on a trip. I have a functional PW3 now, so I can explore making such a KUAL extension... Hmm... I just realized I can probably modulate (baseband AM, or at least PWM) the backlight for audio output for my kindle video player. A photocell connected to amplified speakers should work for that. I may need to build a kernel module for such add-on audio support for mute kindles like the paperwhite (or K4 with modulated power LED) models. Last edited by geekmaster; 05-09-2016 at 11:02 AM.

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05-07-2016, 02:02 PM	#2
HarryT eBook Enthusiast Posts: 85,544 Karma: 93383099 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	Presumably you're reading in low light if you have the frontlight on its lowest level. Won't turning it off completely cause even more eye strain? The screen will be more difficult to read without any light!

05-07-2016, 04:14 PM	#6
Barbara1955 Non-Techy Posts: 4,455 Karma: 15499273 Join Date: Feb 2011 Location: WV---USA Device: Samsung Cell Phone & Amazon Fires & Kobo eReaders	I get eye strain at the Lowest setting even in Bright sunlight. My eyes more comfortable hat higher settings. Try increasing the light see what happens.

05-08-2016, 05:35 PM	#7
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	Since you are jailbroken, you should be able to disable the frontlight using peterson's Front Light Master extension. (It is possible the method used to control the frontlight needs to be updated for KV compatibility. Either way, the current extension should certainly give you an idea of what might need doing.)

05-09-2016, 11:38 AM	#9
eschwartz Ex-Helpdesk Junkie Posts: 19,421 Karma: 85400180 Join Date: Nov 2012 Location: The Beaten Path, USA, Roundworld, This Side of Infinity Device: Kindle Touch fw5.3.7 (Wifi only)	@geekmaster, Like I said, peterson already made one. As I don't own any frontlit Kindle, I don't know whether they all share the same sysfs controls or need to be updated for different models.

05-12-2016, 02:57 PM	#10
Yourcat Groupie Posts: 175 Karma: 54048 Join Date: Mar 2016 Device: PW3 5.6.5-usbnet	The orange and green LEDs would may stereo "playback" if you enjoy PWM.

05-12-2016, 03:07 PM	#11
Yourcat Groupie Posts: 175 Karma: 54048 Join Date: Mar 2016 Device: PW3 5.6.5-usbnet	With usbnet you may check whether https://www.mobileread.com/forums/sho...68&postcount=4 works for the KV. Adding this to the suspend or wake-up event script should be acceptable instead of a Kual menu. Starting reading one may need to increase/change the brightness anyway.

05-12-2016, 08:26 PM	#13
NiLuJe BLAM! Posts: 13,506 Karma: 26047190 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	AFAIR, we're successfully using that path in KOReader for the whole Wario range . And I can attest that it still holds true on my PW2 on 5.7.x.

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