Touch latency

[kakatorres1999]

I was having a tough time typing fast on the phone and made a post about it earlier. Trying to look for the issue, I came across these

https://www.reddit.com/r/Xiaomi/comments/9ntl73/is_your_device_affected_by_touch_latency_issues/

https://www.reddit.com/r/Xiaomi/comments/a1m7ao/xiaomi_mi_a2_touch_latency/

Surprisingly, the behaviour is quite similar to these threads here. I request xda users with a redmi note 7/ 7 pro to carry out this small test of trying to type the words 'qu' and 'scope' fast (if possible, try to run this test a few times with space after each qu and scope, say 10 times, so that we can be sure that the results are consistent and do remember to type the same word 10 times consecutively and then move on to the other word and type it ten times consecutively) and report how many times it turns out as uq and scoep on doing so.

Please mention if you tried this test with:

a screen protector installed (also mention the type of screen protector, i.e. tempered glass or plastic) or without one

your device variant (indian or chinese) and
if possible your display manufacturer which should appear after typing *#*#6484#*#* in dialer and going to software information> lcm information

If you have any other devices, try this on them as well and report how it goes, so that we can have some reference points.

For reference my device is redmi note 7 pro indian variant with edge to edge tempered glass protector installed, lcm information: nt36672a shenchao panel.

 

[1375965485501144093271341]

Hello sir/ma'am, i just tried this "test" and i found no such issues on my device. If it is of any importance, my device is a chinese one.

 

[kakatorres1999]

Hello sir/ma'am, i just tried this "test" and i found no such issues on my device. If it is of any importance, my device is a chinese one.

Thanks for reporting sir/ma'am. Do you have any screen protectors installed? (If yes, tempered glass or plastic)
Your device variant description was indeed important, I'll update the original post requesting to include device variant as well.
Could you also provide the display manufacturer details? It should be appear after typing *#*#6484#*#* in dialer and going to software information> lcm information.

 

[kakatorres1999]

Deleted

 

[1375965485501144093271341]

I am not using any screen protectors on my device (PRO), sir/ma'am. The info you requested: nt3672a video mode dsi schenchao panel

 

[kakatorres1999]

I am not using any screen protectors on my device (PRO), sir/ma'am. The info you requested: nt3672a video mode dsi schenchao panel

Thanks kind sir/ma'am. Could you also try typing scope fast for a few times and report what you observe?
Both of our devices have panels from the same manufacturer but mine has nt36672a instead.

 

[1375965485501144093271341]

I am sorry sir/ma'am, i made a typo in my last sentence. The display in my device also has a nt36672a designation. As far as typing scope, no mater how fast i try to type it, it always gets registered without any problems. I can not produce the issue you and some other users are facing.

 

[kingd0097]

I an facing a similar issue my is the global varient of note 7 pro and its lags during typing and i am using full screen tempered glass

 

[kakatorres1999]

I an facing a similar issue my is the global varient of note 7 pro and its lags during typing and i am using full screen tempered glass

So far, atleast 3 confirmed cases including mine.

 

[4K2K]

Display: nt26672a video mode dsi shenchao panel.
Screen protector: none.
Device and rom: Chinese

I used Poco F1 which does not have any sort of touch problems. Always wondered that the fuss was about then this N7P.
There is certainly a touch delay which is worse if you use a keyboard with vibration: the mismatch between actual touch and vibration makes it feel like you are using a juice-spilled keyboard. I overcame this issue by greatly reducing strength of vibration and typing a bit slowly.

What still get me is its touch scroll behavior. Short fling, especially bottom to up, does not move screen in a smooth way. Rather, it scrolls a bit then abrupt break. Worse is when you are using Instagram. When you swipe left or right to see the next picture, it will show about 1/4 of it then jump back to previous one. Very annoying. Overall, it feels like I am using a phone with outdated CPU.

With Poco F1, this sort of touch problems were addressed heavily which lead Xiaomi to come up with fixes. I do not expect that will be the case with N7P. I am hoping that changing touch friction and scroll fling values in buildprop would at least make it less annoying. I may try that once I get unlocked.

 

[PsyCLown89]

I do not have the same issue, I use SwiftKey as my keyboard though if that makes any difference.

Have the RN7 Pro Chinese version with no screen protector.

I can't get the screen info, when I copy / paste the code and dial it does not complete?

That being said I have felt as if SwiftKey is a little laggy on my previous phone and it's better on the RN7 Pro - although not as smooth as on my Mi 5 I use to have.

Sent from my Redmi Note 7 Pro using Tapatalk

 

[kakatorres1999]

Display: nt26672a video mode dsi shenchao panel.
Screen protector: none.
Device and rom: Chinese

I used Poco F1 which does not have any sort of touch problems. Always wondered that the fuss was about then this N7P.
There is certainly a touch delay which is worse if you use a keyboard with vibration: the mismatch between actual touch and vibration makes it feel like you are using a juice-spilled keyboard. I overcame this issue by greatly reducing strength of vibration and typing a bit slowly.

What still get me is its touch scroll behavior. Short fling, especially bottom to up, does not move screen in a smooth way. Rather, it scrolls a bit then abrupt break. Worse is when you are using Instagram. When you swipe left or right to see the next picture, it will show about 1/4 of it then jump back to previous one. Very annoying. Overall, it feels like I am using a phone with outdated CPU.

With Poco F1, this sort of touch problems were addressed heavily which lead Xiaomi to come up with fixes. I do not expect that will be the case with N7P. I am hoping that changing touch friction and scroll fling values in buildprop would at least make it less annoying. I may try that once I get unlocked.

I don't use vibrate on keypress but I still face the issue.

For Instagram, I just downloaded it to check that out and I too experience that sometimes it does not move to the next image and even moves backwards/to the previous image instead. One more thing I noticed was, on Instagram, when you go to explore and are checking posts which have 'more' (large amount of text and hence the option to read 'more') in their descriptions, it often jumps to the next post instead of allowing you to read more of what is written in the description, almost feels like the touch accuracy is off or might be just an Instagram thing.

Scrolling is also a bit inconsistent, on short flings, it sometimes moves downwards and then upwards a bit and at times it scrolls in the opposite direction (but that is rare).

 

[kakatorres1999]

I do not have the same issue, I use SwiftKey as my keyboard though if that makes any difference.

Have the RN7 Pro Chinese version with no screen protector.

I can't get the screen info, when I copy / paste the code and dial it does not complete?

That being said I have felt as if SwiftKey is a little laggy on my previous phone and it's better on the RN7 Pro - although not as smooth as on my Mi 5 I use to have.

You can access this through settings> about phone> kernel version (tap a few times)> software version> lcm information. Thanks for the feedback.

 

[PsyCLown89]

You can access this through settings> about phone> kernel version (tap a few times)> software version> lcm information. Thanks for the feedback.

Nt36672a

Sent from my Redmi Note 7 Pro using Tapatalk

 

[4K2K]

I don't use vibrate on keypress but I still face the issue.

For Instagram, I just downloaded it to check that out and I too experience that sometimes it does not move to the next image and even moves backwards/to the previous image instead. One more thing I noticed was, on Instagram, when you go to explore and are checking posts which have 'more' (large amount of text and hence the option to read 'more') in their descriptions, it often jumps to the next post instead of allowing you to read more of what is written in the description, almost feels like the touch accuracy is off or might be just an Instagram thing.

Scrolling is also a bit inconsistent, on short flings, it sometimes moves downwards and then upwards a bit and at times it scrolls in the opposite direction (but that is rare).

Yes, that is the issue. It is too bad that the phone failed QC this bad; otherwise, it would have been a great phone.
BTW, is your phone unlocked? Are you using a Chinese version of the phone. I am wondering if changing to Indian rom or different roms would fix this issue.

 

[kakatorres1999]

Yes, that is the issue. It is too bad that the phone failed QC this bad; otherwise, it would have been a great phone.
BTW, is your phone unlocked? Are you using a Chinese version of the phone. I am wondering if changing to Indian rom or different roms would fix this issue.

No, my phone isn't unlocked and I mentioned in the OP that I have an Indian variant.

 

[manohar123]

I am also facing the same issue my varient is Redmi note 7 pro india 4/64gb

 

[AbhiAbhiBisht]

I was having a tough time typing fast on the phone and made a post about it earlier. Trying to look for the issue, I came across these

https://www.reddit.com/r/Xiaomi/comments/9ntl73/is_your_device_affected_by_touch_latency_issues/

https://www.reddit.com/r/Xiaomi/comments/a1m7ao/xiaomi_mi_a2_touch_latency/

Surprisingly, the behaviour is quite similar to these threads here. I request xda users with a redmi note 7/ 7 pro to carry out this small test of trying to type the words 'qu' and 'scope' fast (if possible, try to run this test a few times with space after each qu and scope, say 10 times, so that we can be sure that the results are consistent) and report how many times it turns out as uq and scoep on doing so.

Please mention if you tried this test with:

a screen protector installed (also mention the type of screen protector, i.e. tempered glass or plastic) or without one

your device variant (indian or chinese) and
if possible your display manufacturer

If you have any other devices, try this on them as well and report how it goes, so that we can have some reference points.

For reference my device is redmi note 7 pro indian variant with edge to edge tempered glass protector installed.

Indian variant 4/64
NT36672a
Edge to edge tempered glass applied

4/10 times I was failed to type scope... Sometimes it registered scoep and sometimes e was never registered.

 

[kakatorres1999]

Indian variant 4/64
NT36672a
Edge to edge tempered glass applied

4/10 times I was failed to type scope... Sometimes it registered scoep and sometimes e was never registered.

Quite similar experience to mine except mine has a tendency to miss a's instead of e's.

 

[darshan9222]

Indian variant here, with shenchao panel, touch latency issues are there typing scope faster makes it scoep and also 4-5 times out of 10 times typing qt makes it tq
I have installed screen protector though

Issues are similar to my friends pocofone