Smoother digitizer (scrolling) on Android 9? - OnePlus 5T Questions & Answers

When I got my 5T one year ago, I noticed that the scrolling was a bit jittery while I touched the screen. Any scrolling that happened when I wasn't touching the screen was smooth so I figured it had to do with the digitizer. I read some thread about it but never found a solution, and I finally accepted the fact that this phone didn't feel as smooth as my Nexus 6 did on this regard.
However, after the Android Pie update, the scrolling is now much smoother. There's barely any noticeable difference between scrolling with my finger in Chrome and scrolling that happens without interaction (like when I push away a page and let it scroll by itself).
Am I the only one experiencing this? Maybe I'm extra sensitive to these things, or perhaps my phone had some weird bug that finally got overwritten with the OS update - I never tried factory resetting my device.

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Screen Tearing/Lagging while scrolling

My N7 fell in water the other day and even though there are no issues with the tablet itself, I'm not sure if the touch screen was damaged or not.
Whenever I scroll on a page or app, it looks like the screen is tearing or lagging and it seems like it's take a split second to catch up with the scrolling. This doesn't appear to be the case with watching video though as playback appears fine.
I'm running 6.01 on the Pure Nexus Rom, in case it's software based but I don't think it is as I was running a different 6.01 rom prior to that with the same issue.

Stuttering and freezing of some apps. Help!

I just got the Nexus 5X some 2-3 weeks ago. First week or two was smooth sailing after setting up the phone as a brand new phone in the initial setup process. I did not restore a backup from a previous phone.
Since then, I've had occasional freezing of apps like the homescreen freezes momentarily and becomes black and unresponsive only to be back to normal shortly thereafter. Likewise I had freezes with Google Music and Chrome. Today however has been my worst attack of freezing. I am reading some articles on Chrome and the bloody thing freezes like crazy. Scrolling is unresponsive and very rough, the interface becomes unresponsive. Home/Back/Recents buttons become unresponsive. I am not sure if the websites are at fault, they are salon.com and huffingtonpost.com that I am reading. And this issue seems very pronounced and doesn't go away in a short while like before. I still have the problem after like 10-15 minutes. Looks like other apps like Facebook are mostly okay, although I see a occasional slow down there.
I note that I am charging my phone while doing this browsing and I am wondering if the heating up of the phone due to charging is causing issues. Is this what people refer to as lag on this phone? Is there a solution?
EDIT: I used an app called "CPU temp" and saw the temperature to be around 39-40C. Also, I read elsewhere on XDA that the CPU is throttled at around 37C in the default kernel. So could this be why I saw all that lag? Now I don't seem to have any issues with Chrome anymore and I can navigate any page including on Salon.com fairly well although Salon is still a bit laggy on not just this but other phones I have, so their website may also have some issues.

Device slightly "choppy" after January Update?

Hi there,
after flashing the most recent OTA Update, my device seems a little choppy here and there, scrolling isn't as smooth as it used to be. It is a very minor difference, but recognizable. My brother's experience is about the same after installing the latest update. It is no game breaker, but I loved the buttery smooth scrolling from before.
Does anybody else experience a slight drop in smoothness after the update?
That's a known issue with the full OTA package. Just reboot and all will be fine.
Already tried that, the slight drop in smoothness persists. I think I'll try a full wipe tomorrow.
Try lowering Animations Scale in Developers Settings to .5x
I fastbooted the factory image without the -w and it was indeed very choppy. Now, this was a problem that Google addressed and said that rebooting would fix it. Rebooting did speed it back up, but after a short period of time, a day I think, I my phone became noticeable slower. Although I did not notice a drop in scrolling smoothness, There would be a clear delay from the time I pressed the home button to when the animation of the app closing began. I wasn't too sure what was going on, and was desperately hoping that this was not happening because of prolonged use. I personally think Google somehow messed up and made it so that sideloading either the ota or factory images slowed the device down. There is no way a pixel would begin to slow down that much after such a short period of time (I think I wiped my phone about a month before I flashed the January image). I thought it could've been the January image itself causing the slowdowns, so I flashed back to December security patch and took the OTA and it was smooth like normal. I have not used the January image long enough to determine if Google messed something up with sideloading or whether the slowdowns just came with prolonged use.
I apologize for the essay, but I just wanted to share my experience. Hope this helps!

Phone stuttering and lagging more each day

Anyone also experiencing same issues? After the PIE update months ago, everything began going downwards. Scrolling sometimes getting laggy or sticky (like pulling a gum from the ground), stuttering on some apps like chrome etc. Should i go back to Oreo? For me personally seems like this whole PIE thing was just a half-assed rebranded thing for OP5/5T originally meant to be devices like OP6/6T they just released half-assed update to satisfy people asking for pie update.
https://forum.xda-developers.com/oneplus-5t/help/oneplus-5t-suddenly-lagging-t3896998
You're not alone.
I noticed this straight away when I "upgraded" to pie. Very noticeable when scrolling. If you leave the phone idle for a couple seconds (around more than 20-30 seconds), then scroll again, there's a very noticeable lag.
Another user on reddit managed to capture the issue
Unfortunately there's no fix. I wiped the cache and then factory reset. Still had the issue.
I ended up just going back to Oreo, which I recommend you do if you want smooth performance again.
ldAbl said:
You're not alone.
I noticed this straight away when I "upgraded" to pie. Very noticeable when scrolling. If you leave the phone idle for a couple seconds (around more than 20-30 seconds), then scroll again, there's a very noticeable lag.
Another user on reddit managed to capture the issue
Unfortunately there's no fix. I wiped the cache and then factory reset. Still had the issue.
I ended up just going back to Oreo, which I recommend you do if you want smooth performance again.
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Same problem here, no one want to help us. Like problem did not exist
I started having this problem since going to Pie, but the phone only stutters randomly about once or twice a day for me. A temporary solution for my phone is that whenever it lags, I press the power button to lock the phone. After unlocking, the stutters go away. Let me know if it works for you.
Go to beta one

Reduced touch screen responsiveness after OTA 12.1.1.0(JRDMIXM)

Hi there,
I had gotten the OTA on my Mi 10T Pro some time back and since the update, I notice the screen responsiveness reduce a lot. I always missed the gesture to perform back or pull the notification status down or any other gesture.
I even notice my Capacitive Pen (fine tips) wasn't registering the touch too. Previously, it was working fine on my Mi 10T Pro.
Do you notice that too? Or it is only me?
I have the same problem with big lags on the touchscreen, or maybe big lags on the apps that freeze touchscreen changes.
I updated to 12.1.1 Global via an OTA a few weeks ago, but had to factory reset to get it working. Then it worked well, except for the very annoying lack of gesture support for non-stock launchers.
Now I get major lags scrolling through items or using swipe on the Google Keyboard. Very frustrating ,and I only hope the 12.5 update comes soon and fixes things.
Look like we are not alone.
You set to factory default fix the problem?
No, it's still lagging badly.
I had to Factory Reset to get the phone to work acceptably after the OTA to Android 11. It worked well for a couple of weeks, then started lagging badly with many apps involving a long swipe (like keyboard using swipe, scrolling through news etc) would become unresponsive after about 1/2 sec movement.
Reboots didn't seem to fix it but may have improved things for a while before returning to lag.

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