iMac 5K Graphic Shuttering Issue

lscangus · Oct 26, 2014

https://www.youtube.com/watch?v=yS7l8E5Rpd4&list=UU0h9FEjQ0lCFnusSzlPZOeg

I have bought the iMac 5k. But I have noticed sometimes there are graphic shuttering when rendering the interface. Please have a look at the video and see if anyone has similar issue.

PS. Video was a 120FPS Slow-mo

A

BlazednSleepy · Oct 26, 2014

SMC and PRAM reset.

lscangus · Oct 26, 2014

thanks! will try it later today!

The Doctor11 · Oct 26, 2014

lscangus said:
PS. Video was a 120FPS Slow-mo

Doesn't matter youtube is only 30 FPS

iMcLovin · Oct 26, 2014

Hmm, if this is a common issue I would expect it wo be a firmware fix for it pretty soon

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The Doctor11 said:
Doesn't matter youtube is only 30 FPS

Man, its still slow mo

120fps converted to 30 fps will still hold the same speedrate.

The Doctor11 · Oct 27, 2014

iMcLovin said:
Man, its still slow mo 120fps converted to 30 fps will still hold the same speedrate.

Oops I did acctuly watch the video

lscangus · Oct 27, 2014

I dunno if it is common or not. Sometimes is smooth and sometimes is very choppy.

Georgio · Oct 27, 2014

iMcLovin said:
Hmm, if this is a common issue I would expect it wo be a firmware fix for it pretty soon

It's going to need a bit more than a firmware fix...

iMcLovin · Oct 27, 2014

Georgio said:
It's going to need a bit more than a firmware fix...

I would think that if it happens some times, not always, it has to be something thats possible to fix with code. But, of course if it happens every time, then its more worrysome

lscangus · Oct 27, 2014

anyone has similar issue?

dlewis23 · Oct 27, 2014

What GPU do you have?

Sunday Ironfoot · Oct 27, 2014

Have you tried it with a different webpage? Try the Google homepage, I'm thinking it may have something to do with the Flash videos on Youtube.

Also does this happen with other applications, or just Safari?

lscangus · Oct 27, 2014

Sunday Ironfoot said:
Have you tried it with a different webpage? Try the Google homepage, I'm thinking it may have something to do with the Flash videos on Youtube.

Also does this happen with other applications, or just Safari?

it does it even with just a finder window.

Upgraded GPU

Traverse · Oct 27, 2014

Well there will be arguments about the 5K display being too much for the GPU, but it honestly seems like OS optimization issues. I've had a UI buts and occasional graphic issues on my rMBP since updating to Yosemite.

lscangus · Oct 27, 2014

GUYS! Problem solved!

The problem has to be related to my user account. Once I have created and log into a brand new account. It is as smooth as silk. For now. Will keep you guys updated.

dlewis23 · Oct 27, 2014

lscangus said:
GUYS! Problem solved!

The problem has to be related to my user account. Once I have created and log into a brand new account. It is as smooth as silk. For now. Will keep you guys updated.

For everyone I know who has tried that it went right back to doing it after a short while.

jji7skyline · Oct 27, 2014

Return it and see if a new one helps.

dlewis23 · Oct 27, 2014

jji7skyline said:
Return it and see if a new one helps.

If its the m290x they all do it. I've been through 3 everyone had the problem. I talked to a genius at my local store and he said he's seen quite a few come back with the issue.

aggri1 · Oct 27, 2014

dlewis23 said:
If its the m290x they all do it. I've been through 3 everyone had the problem. I talked to a genius at my local store and he said he's seen quite a few come back with the issue.

Hi YouTube video is captioned "I7 with upgrade GPU".

bwsteg · Oct 28, 2014

Is it normal when scrolling through a web page, theres a bit of lag/hesitation. Basically the page doesnt scroll smoothly especially when first entering a new page.

GolferChris68 · Oct 28, 2014

dlewis23 said:
If its the m290x they all do it. I've been through 3 everyone had the problem. I talked to a genius at my local store and he said he's seen quite a few come back with the issue.

With all the pixels in this display, that's why I chose the highest GPU option (m295x). Even so, it's not the fastest display. But it is very crisp and clear.

Anonymous Freak · Oct 28, 2014

My off-the-cuff guess would be a driver issue - that type of graphic tearing is usually driver related. With the newness of such ultra-high resolution, it wouldn't surprise me if there are a few learning curve glitches that take a few patches over the next couple months to sort out.

(I'm waiting for my annual bonus, then I'll be getting the same i7+M295X model. Still debating on if I want to go through the effort of opening and upgrading the hard drive myself to something bigger than 3 TB (and rebuild the Fusion array,) or if I'll just make do with external storage.)

5iMacs · Oct 28, 2014

lscangus said:
anyone has similar issue?

Well, I grabbed my iPhone and steeled myself for the bad news, thinking I might possibly have missed it, but I could not reproduce this issue (i5/M290X).

With constant wiggling back and forth of the youtube page I just got the occasional (once every 5 seconds) appearance of strobing/tearing right along the right edge of the window, like a frame drop. I don't think I would ever have noticed it myself. Nothing like the inside the window repeatedly filling in piecemeal, that's pretty severe in my opinion.

sorry man, I think it's going to have to be repaired.

habeebhashim · Oct 28, 2014

lscangus said:
https://www.youtube.com/watch?v=yS7l8E5Rpd4&list=UU0h9FEjQ0lCFnusSzlPZOeg

I have bought the iMac 5k. But I have noticed sometimes there are graphic shuttering when rendering the interface. Please have a look at the video and see if anyone has similar issue.

PS. Video was a 120FPS Slow-mo

A

ugh... that looks terrible. I don't have this problem on my i7/m295X. Even with Mission Control which has been an issue with my rMBP before.

Good that a user reset fixed it for you. Hopefully it won't come back. But I think an AppleCare is needed... just in case.

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5iMacs said:
Well, I grabbed my iPhone and steeled myself for the bad news, thinking I might possibly have missed it, but I could not reproduce this issue (i5/M290X).

With constant wiggling back and forth of the youtube page I just got the occasional (once every 5 seconds) appearance of strobing/tearing right along the right edge of the window, like a frame drop. I don't think I would ever have noticed it myself. Nothing like the inside the window repeatedly filling in piecemeal, that's pretty severe in my opinion.

sorry man, I think it's going to have to be repaired.

I tried it just now on the rMBP to see if I can induce a similar effect. Nothing. This is a 1st-gen base 2012 rMBP (yes, the one that many people have issues with)

Will you try replacing or upgrading your 5K cos of this?

5iMacs · Oct 28, 2014

habeebhashim said:
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I tried it just now on the rMBP to see if I can induce a similar effect. Nothing. This is a 1st-gen base 2012 rMBP (yes, the one that many people have issues with)

Will you try replacing or upgrading your 5K cos of this?

Oh, no, that's not what I meant.

I was making a suggestion to lscangus to repair his.

This glitch of an occasional dropped frame is so minor I would never think about it again.

We're talking about .5cm strip of tearing right at the edge of the window, only after much contrived wiggling.

iMac 5K Graphic Shuttering Issue

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