MobileRead Forums - View Single Post - Poke 3 (& Poke 2, other Onyx?) screen light

Renate · 07-03-2021, 07:05 AM

I have nothing against any other Onyx, except for the fact I don't own it.
I only read on my Poke3 nowadays, but if someone has a question on something I do own, I can just reach into my crate of ereaders and dust one off.

Last night in the dark I found that I could barely read with the brightness set at 25%.
So, you're saying that 5% is seriously too bright?

Those commands were trying to figure out if the Poke2 uses the same LM3630A LED driver.
Then there is also the possibility that they are using that in linear mode (instead of exponential).

I can write code to poll the IC for what mode it's in, but you need root for that.
You could look through /sys/firmware/devicetree, but you need root for that.
If somebody has a rooted Poke2 we can try that.

Of course you could do it the easy way: extract the boot image, extract the kernel from that, detach the device tree from that, decompile it.

Edit: Well, this works fine. Anybody have a rooted Poke2?

Code:

Poke3:/data/local/tmp # ./lights
warm i2c-6 38
00  Control           06
01  Configuration     18
02  Boost Control     58
03  Brightness A      00
04  Brightness B      a9
05  Current A         0a
06  Current B         0a
07  On/Off Ramp       0a
08  Run Ramp          0a
09  Interrupt Status  02
0a  Interrupt Enable  00
0b  Fault Status      00
0f  Software Reset    00
12  PWM Out Low       00
13  PWM Out High      00
1f  Revision          02
50  Filter Strength   00
white i2c-6 38

07-03-2021, 07:05 AM	#13
Renate Onyx-maniac Posts: 4,065 Karma: 18027877 Join Date: Feb 2012 Device: Nook NST, Glow2, 3, 4, '21, Kobo Aura2, Poke3, Poke5, Go6	I have nothing against any other Onyx, except for the fact I don't own it. I only read on my Poke3 nowadays, but if someone has a question on something I do own, I can just reach into my crate of ereaders and dust one off. Last night in the dark I found that I could barely read with the brightness set at 25%. So, you're saying that 5% is seriously too bright? Those commands were trying to figure out if the Poke2 uses the same LM3630A LED driver. Then there is also the possibility that they are using that in linear mode (instead of exponential). I can write code to poll the IC for what mode it's in, but you need root for that. You could look through /sys/firmware/devicetree, but you need root for that. If somebody has a rooted Poke2 we can try that. Of course you could do it the easy way: extract the boot image, extract the kernel from that, detach the device tree from that, decompile it. Edit: Well, this works fine. Anybody have a rooted Poke2? Code: Poke3:/data/local/tmp # ./lights warm i2c-6 38 00 Control 06 01 Configuration 18 02 Boost Control 58 03 Brightness A 00 04 Brightness B a9 05 Current A 0a 06 Current B 0a 07 On/Off Ramp 0a 08 Run Ramp 0a 09 Interrupt Status 02 0a Interrupt Enable 00 0b Fault Status 00 0f Software Reset 00 12 PWM Out Low 00 13 PWM Out High 00 1f Revision 02 50 Filter Strength 00 white i2c-6 38 Last edited by Renate; 07-03-2021 at 08:26 AM.