Lumia 1320 jerky scrolling

[anon5658834]

Trust me there is and it was jerky just the video doesn't show it up well that's why I was reluctant to do it.

 

[a5cent]

Honestly from your video I can't see if there really is any scrolling problems, it seems pretty smooth from the video at least.

I looked at it and it seemed very jerky to me. Scrolling does follow his finger, so lag might not be the correct term. To me it looks like it's dropping a frame every so often. As if scrolling regularly pauses for a fraction of a second at regular intervals. I think you can see this best by looking at the bottom/top screen edges in the video.

Would you agree with that description Sean?

I wonder if this could be vsync related for some reason?

Despite Adreno 305 not being a high end GPU it does power a lot of 720p displays pretty smoothly.

Take for example Galaxy Grand 2 or HTC Desire 816, these phones are run by Adreno 305 at 720p resolution.

Thanks for that info salmanahmad! I wasn't aware of those devices.

 

[anon5658834]

Yeah I guess I agree it's as almost as if when you scroll the screen is shaking,wobbling. I have 4.11gb internal memory left,only two downloaded apps running on the background What's App and 6Tag. I don't want to block What's App as I won't get messages come through. Any apps I am using I don't have tons running at the same time I make sure I close them. As I say all else is fast and smooth but I want to know why it jerks when in Games menu which is Microsoft's own software and also when tilting from portrait to landscape in gallery it jerks again. So is it app related or not?? Cos the phones own internal software and apps kike Games and Gallery lag is not right

 

[a5cent]

Yeah I guess I agree it's as almost as if when you scroll the screen is shaking,wobbling. I have 4.11gb internal memory left,only two downloaded apps running on the background What's App and 6Tag. I don't want to block What's App as I won't get messages come through. Any apps I am using I don't have tons running at the same time I make sure I close them. As I say all else is fast and smooth but I want to know why it jerks when in Games menu which is Microsoft's own software and also when tilting from portrait to landscape in gallery it jerks again. So is it app related or not?? Cos the phones own internal software and apps kike Games and Gallery lag is not right

Both of those background tasks run for a few seconds every half hour, so they aren't really "running" in the background at all. Deactivating them makes no difference. Internal storage space is also completely irrelevant.

Why do you think my explanation doesn't equally apply to the games app and to the screen reorientation animation? I think it explains both of those just as it explains everything else you are seeing.

My guess right now would be that the GPU can't scroll those images across the 720p screen at 30 frames per second, causing it to occasionally drop a frame, which leads to the stuttering you are seeing. Without source code however, none of us can really be sure. All we can really do is guess.

 

[anon5658834]

Ah well thanks for all your help guys.

 

[salmanahmad]

Both of those background tasks run for a few seconds every half hour, so they aren't really "running" in the background at all. Deactivating them makes no difference. Internal storage space is also completely irrelevant.



Why do you think my explanation doesn't equally apply to the games app and to the screen reorientation animation? I think it explains both of those just as it explains everything else you are seeing.



My guess right now would be that the GPU can't scroll those images across the 720p screen at 30 frames per second, causing it to occasionally drop a frame, which leads to the stuttering you are seeing. Without source code however, none of us can really be sure. All we can really do is guess.

Actually background tasks and memory do matter.

On Windows Phone 8.1 apps like Whatsapp refresh every minute, instead of the old 30 minute refresh time however Windows Phone handles app in memory pretty well, so this isn't an issue.

Phone memory also contributes to performance but only when you have a tiny fraction of memory left, so this isn't an issue as well.

I wonder if you can debug apps on your PC to see what is causing the issues.

 

[switch side method]

Just worked out what the problem is it's the app itself. If you press the 3 dots in the bottom right hand corner then select "open in browser" it will display this page in a different format and scrolls perfectly

 

[switch side method]

Or....keep to what you are using...and just pinch the screen to zoom in or out a bit. Found that soughted the problem out

 

[salmanahmad]

Just worked out what the problem is it's the app itself. If you press the 3 dots in the bottom right hand corner then select "open in browser" it will display this page in a different format and scrolls perfectly

Opening in Browser takes you to the Web version of the site your trying to access, sure it becomes smoother but you lose out on a lot of functionality and optimization.

 

[switch side method]

The zoom in and zoom out function works a lot better. Slight scroll....but big improvement I thought

 

[emperor_skull]

I sometimes have this problem with my 925(dp 8.1)

 

[salmanahmad]

I believe Windows Phone 8.1 Update 1 should offer some performance improvements, which may fix this.
Sent from my RM-914_im_mea3_380 using Tapatalk

 

[anon5658834]

I just noticed today another stuttery issue. When I turn the device off and slide down the wallpaper that stutters too only slightly though. I have no stuttering in the browser

 

[Abhishek Yadav1]

well well my Lumia 1020 has same issues!!its like dropping a frame!it happens when I open settings>touch>change touch sensitivity.it happens when u try to log into instagram beta!it happens when u read articles in wpcentral app.it happens when in whatsapp I see the medias sent by a contact!!