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Old 09-18-2018, 12:23 AM   #16
realityloop
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Any chance of a cleaner way to implement this?
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Old 09-19-2018, 03:58 AM   #17
keithwwalker
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I went the KingRoot then SuperSU-Me Pro route as well. I tried two other methods including 'Kingoroot' that did not work.

Now that I have root, can someone recommend a good app to adjust the CPU governor?

Thanks, Keith
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Old 09-19-2018, 01:04 PM   #18
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You can use Kernel Adiutor for governor tweaks: on its main screen, tap the top left corner to pull out the menu (I guess there's an icon but it's invisible on boox).
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Old 09-19-2018, 06:54 PM   #19
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Could anyone who has tried tweaking the kernel settings comment on the results? Has there been a significant improvement in fluidity of the UI in general? Less battery life?
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Old 09-19-2018, 08:00 PM   #20
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Edit, with Kernal Adiuator, I tried out changing the minimum CPU frequency to 408hz (from 126hz) and trying Graffiti text input with Evernote.

I did not notice an appreciable change with regard to screen latency (the lag of the stylus as I write in the letters).

I tried the CPU Governor settings of 'Interactive' as well as 'Ondemand'

With Ondemand setting, the response was a little better with launching programs but thats about it.

The screen latency, or updating, still seems to be about 1 second lag. As I mentioned before, if you don't look at your text input, it is not a problem. That is fine for handwriting recognition - but disastrous with an onboard keyboard. As a side note, I also tried writing in A2 mode and the result wasn't any better.

I read somewhere that with e-ink a grayscale screen update takes about 750ms to update, while a black/white screen update takes 125 to 250ms. It seems that apps like Evernote, Onenote and Graffiti are forced to 750ms by default which is coincident with my experience.

If there was a way to force those apps to only be updating in black/white mode then the latency could be reduced to 1/8 of a second, which would be quite acceptable.

Looking for ideas to get the screen latency down now...

~~~~~~~~~~~
Thanks for the advice, will report back on latency and Access Graffiti text input.

Last edited by keithwwalker; 09-20-2018 at 08:35 PM.
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Old 09-21-2018, 01:58 AM   #21
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Quote:
Originally Posted by keithwwalker View Post
If there was a way to force those apps to only be updating in black/white mode then the latency could be reduced to 1/8 of a second, which would be quite acceptable
? To force A2 mode you have a quick toggle in the NE corner, in the statusbar...
I remember - also out of tests done with video recording - A2 is a pretty constant 125ms. GU (Regal?) is very close to 600ms.

Of course, the matter is that A2 severely impacts rendering quality - flattening information to 1/16th of it.
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Old 09-21-2018, 09:13 AM   #22
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Quote:
Originally Posted by keithwwalker View Post
Edit, with Kernal Adiuator, I tried out changing the minimum CPU frequency to 408hz (from 126hz) and trying Graffiti text input with Evernote.

I did not notice an appreciable change with regard to screen latency (the lag of the stylus as I write in the letters).

I tried the CPU Governor settings of 'Interactive' as well as 'Ondemand'

With Ondemand setting, the response was a little better with launching programs but thats about it.

The screen latency, or updating, still seems to be about 1 second lag. As I mentioned before, if you don't look at your text input, it is not a problem. That is fine for handwriting recognition - but disastrous with an onboard keyboard. As a side note, I also tried writing in A2 mode and the result wasn't any better.

I read somewhere that with e-ink a grayscale screen update takes about 750ms to update, while a black/white screen update takes 125 to 250ms. It seems that apps like Evernote, Onenote and Graffiti are forced to 750ms by default which is coincident with my experience.

If there was a way to force those apps to only be updating in black/white mode then the latency could be reduced to 1/8 of a second, which would be quite acceptable.

Looking for ideas to get the screen latency down now...

~~~~~~~~~~~
Thanks for the advice, will report back on latency and Access Graffiti text input.
Did you notice any improvement in the software keyboard?
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Old 09-22-2018, 12:59 AM   #23
keithwwalker
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That's the funny thing, I tried A2 mode and the screen update was still about 1 second. You think it would be faster....

Quote:
Originally Posted by mdp View Post
? To force A2 mode you have a quick toggle in the NE corner, in the statusbar...
I remember - also out of tests done with video recording - A2 is a pretty constant 125ms. GU (Regal?) is very close to 600ms.

Of course, the matter is that A2 severely impacts rendering quality - flattening information to 1/16th of it.
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