AJK Q&A

[AJ Newkirk]

This thread is for all non-development discussions about the AJK kernel.

Please keep it civil and on topic!

Touchscreen Tuning process

1. Open ExTweaks
2. Select Screen tab
3. Go to "Batt Move Filter", increase it BY ONE and apply
4. Test it, if it still stutter, increase ONE STEP ONLY and apply
5. Repeat step 4 till the stutter/jitter is gone. Don't set it too high as it'll result the touchscreen capability lost
6. If "Batt Move Filter" is OK without any jitter again, connect your charger and go to "Chrg Move Filter"
7. Repeat step 4 till you satisfied and again: DON'T SET IT TOO HIGH, ONLY INCREASE TILL THE JITTER/STUTTER IS GONE

Do this at your own risk!
If you lost the touch capability caused by too high value then you will need to reset ExTweaks profile in recovery.

I can say its different for each device as the test shown:
-My S2: Batt Filter 16 & Chrg Filter 50, stutter/jitter gone completely, below that value the screen is stuttering/jittering.
-My son's S2: Batt Filter 13 & Chrg Filter 46, stutter/jitter gone completely, below that value the screen is stuttering/jittering.
-My daughter's S2: Batt Filter 14 & Chrg Filter 48, stutter/jitter gone completely, below that value the screen is stuttering/jittering.

 

[topiratiko]

Also I've noticed for the first few minutes after booting, ajk is smooth but after say 5 or more, its just not as responsive. Ie jittery when swiping through screens, and sometimes it won't register my swipes. Touchscreen driver possibly?

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

 

[AJ Newkirk]

Also I've noticed for the first few minutes after booting, ajk is smooth but after say 5 or more, its just not as responsive. Ie jittery when swiping through screens, and sometimes it won't register my swipes. Touchscreen driver possibly?

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

I would like to try to duplicate that on my phone, but so far I have been unable to.

Can you tell me any certain app this occurs within? Any apps running in the background that may use a lot of RAM or system resources?

Which version of CM10 are you currently running? I will load the same version for comparisons.

Later tonight I am going to be looking at some changes that were made sometime after my old Siyah 7.9 kernel to see if any of those may be responsible for some people having a somewhat laggy interface.

 

[topiratiko]

When I say ui, I'm strictly talking about swiping screens on nova launcher. When I swipe from far left to far right on jhatch, its all one smooth jitter free experience. On ajk, there's jitter, and sometimes I'll swipe once and it'll move over two screens! I don't wanna b THAT guy, as this seems like nitpicking, but Im just trying to provide feedback as I appreciate allvyouve done for this device. Its because of you that kernels even exist for our device as of right now lol. I'm 99% positive that his is based on 7.7 as I remember 7.8 was a bit laggy as well. If you do test, load your screens up with icons and swipe all the way left and all the way right repeatedly and you'll notice it. Also, put it to sleep for a bit then wake and do it again.

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

---------- Post added at 02:20 AM ---------- Previous post was at 02:17 AM ----------

7/24 nightly btw

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

 

[AJ Newkirk]

When I say ui, I'm strictly talking about swiping screens on nova launcher. When I swipe from far left to far right on jhatch, its all one smooth jitter free experience. On ajk, there's jitter, and sometimes I'll swipe once and it'll move over two screens! I don't wanna b THAT guy, as this seems like nitpicking, but Im just trying to provide feedback as I appreciate allvyouve done for this device. Its because of you that kernels even exist for our device as of right now lol. I'm 99% positive that his is based on 7.7 as I remember 7.8 was a bit laggy as well. If you do test, load your screens up with icons and swipe all the way left and all the way right repeatedly and you'll notice it. Also, put it to sleep for a bit then wake and do it again.

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

---------- Post added at 02:20 AM ---------- Previous post was at 02:17 AM ----------

7/24 nightly btw

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

I appreciate the feedback and I realize that you are not nitpicking.

I just got CM10.1 7/25 release loaded and will try it out.

 

[topiratiko]

ALSO, on nova I set scrolling speed to relaxed and scroll effect none

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

 

[4-2ndtwin]

Just to add into this from my perspective and to hopefully help with any troubleshooting... I flashed the ajk v3.2 several hours ago for SHOstock3 v3.0.2 Rom and have left AJ's kernel as it was, i.e. no changes in STweaks, and I'm having no issues at all. Using the SHOstock Rom as is, no other launcher.

Sent from my SAMSUNG-SGH-I777 using xda premium

 

[Eckyx]

I've had an experience similar to topiratiko's on both my phone (lastest CM10.1 nightly + latest SHO3 release) as well as on my wife's (SHOstock3 ~1.8.0 I think), though it's nowhere near as severe is he describes it. Jittery would be an exaggeration in my case, but on both of my phones, scrolling has a slight choppiness that reminds me of running a game without vsync - what looks like tearing when swipping homescreens, a very slightly flickering text when scrolling up and down on chrome or in the calendar, the opening and closing application animation not being 100% buttery smooth. I remember first noticing the scrolling choppiness shortly after you renamed your kernel to AJK. It may or may not have been present before then, and I can't say whether it has changed in severity at all in more recent releases.

It still happens even when locking the clock speed at 1200mhz, and it's present on either of my phones even if they have just been flashed and don't have any apps or settings changed.

It isn't anything even close to unusable but it feels a lot like the jump from ICS to Jelly Bean in terms of UI smoothness.


Still, I continue to use AJK both because jthatch still hasn't fixed (or perhaps fixed and then unfixed in later releases) the audio skipping problem present in Sammy ROMs, his wifi toggle is broken on the only release that runs on the latest SHO, and the auto-brightness gets funky sometimes (rarely) in CM10.1 and requires a reboot before it again displays the correct sensor values - none of which are problems in AJK.

 

[AJ Newkirk]

Could you guys who are having issue please try the steps in the first post of this thread and see if it helps?

The only thing I am seeing so far in Nova launcher is easily fixed by normal touchscreen filter adjustments.

 

[topiratiko]

Step ahead of ya boss! Searched and tried that about a week ago and even with all that tuning it was the same. I also remember becoming frustrated and maxing out a few of the sliders and it didn't disable touchscreen. Do you think the touchscreen driver could b different?
Forgive if that's a dumb question.

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

 

[AJ Newkirk]

Step ahead of ya boss! Searched and tried that about a week ago and even with all that tuning it was the same. I also remember becoming frustrated and maxing out a few of the sliders and it didn't disable touchscreen. Do you think the touchscreen driver could b different?
Forgive if that's a dumb question.

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

The touchscreen driver is indeed different, but I just compiled a test version with the previous touchscreen driver and it made no difference in smoothness on my phones.

I will send you an early copy of the next release which may hold a clue to this mystery.

 

[topiratiko]

Fantastic! Also, can u include previouse touchscreen driver in the test release?

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

 

[AJ Newkirk]

Fantastic! Also, can u include previouse touchscreen driver in the test release?

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

It is in v3.5 and I will PM you the links for testing shortly.

 

[topiratiko]

:beer:

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

 

[Eckyx]

It is in v3.5 and I will PM you the links for testing shortly.

I would like a copy as well, if it's not too much trouble.

 

[AJ Newkirk]

I would like a copy as well, if it's not too much trouble.

PM sent.

Please give feedback after you have tested it for a while.

Thanks!

 

[AJ Newkirk]

Those of you having this issue on AOSP get a chance, please load the Samsung version of the kernel and see if that behaves any differently for you.

 

[topiratiko]

Pmsent

Samsung Galaxy SII I777
CyanogenMod 10.1.2 RCS/AOCP ICEE
Boost 2.34 Kernel

 

[abced123]

@ AJK : what is the benefit of battery/charger move filter ? higher/lower value mean ?
@topiratiko: Do you have greenify installed ? Try it . I also had your problems before greenify. Without greenify, it could lag/jiter for around 30s to 1 minute after boot; with greenify it reduces to 5-10 seconds. I have a lot of background apps as gvphone, viber, skype, wechat, yahoo, zalo, whatsapp, line, etc. all those are greenfied now

 

[AJ Newkirk]

@ AJK : what is the benefit of battery/charger move filter ? higher/lower value mean ?

@topiratiko: Do you have greenify installed ? Try it . I also had your problems before greenify. Without greenify, it could lag/jiter for around 30s to 1 minute after boot; with greenify it reduces to 5-10 seconds. I have a lot of background apps as gvphone, viber, skype, wechat, yahoo, zalo, whatsapp, line, etc. all those are greenfied now

Higher filter value allows more touchscreen signal to be processed.