iMac 2020, 5700XT - graphical glitch?

[shywizard]

I would post any findings to the official Apple forums. That's how Apple ended up reaching out to me to discuss details and request more data. There is also this page that I used to send them feedback when this first occurred: https://www.apple.com/feedback/imac.html -- no idea how often that is reviewed by Apple though.

I'm told Apple doesn't read the Apple Forum. They just host it.

 

[kkh]

Has anyone received any follow up contact from Apple after their initial communication? Just trying to gauge how proactive and attentive they are being to these issues. Certainly by this point their engineers have experienced the problems listed here first hand. It’s mind numbing to think they missed them before the release to begin with.

I received an initial call 2-3 days after posting about this to the Apple official forum. Uploaded screen shots, video, and logs to them that same day. Got a follow up call 2-3 days later to confirm some details. No contact since then. The person I talked to said that I have 30 days to upload more material, send emails with additional details, and it will all be documented and grouped together. During that 30 days (or beyond) somebody may contact me again if they need more information.

 

[kkh]

I'm told Apple doesn't read the Apple Forum. They just host it.

I've heard the same. I've also heard the opposite. The last person I talked to at Apple said that it's why they called me -- because they saw my post there. I've also heard that they don't read stuff here (or any other forums beyond their own) and I've also heard the opposite.

 

[neuralengine]

This is not an option in the poll but I have the i7 / 5500XT and I don’t have the white lines but I do have the occasional glitch in the corners around windows. Some like the example images here and once when there was a cluster of quickly moving red pixels in that exact area.

 

[kkh]

I have to admit I am reluctant though BMWs are not unique in this regard.

Off-topic-ish. I ordered my wife an anniversary gift over two weeks ago. Paid extra for overnight shipping. It didn't arrive when it was supposed to. No emails and no communication from this company about the matter. Went to check my order status on their site. It said backordered. I waited for a bit because I still wanted to get it. It finally shipped two days ago. Got the package today. Finally. Opened it. Empty! Just the packing slip. At least Apple did way better than that. ?

 

[ADGrant]

Has anyone received any follow up contact from Apple after their initial communication? Just trying to gauge how proactive and attentive they are being to these issues. Certainly by this point their engineers have experienced the problems listed here first hand. It’s mind numbing to think they missed them before the release to begin with.

They probably didn't miss them before the release. My guess is someone at Apple probably knew. Companies ship software with known bugs all the time. If they waited until all the bugs were fixed nothing would ever ship.

 

[kkh]

This is not an option in the poll but I have the i7 / 5500XT and I don’t have the white lines but I do have the occasional glitch in the corners around windows. Some like the example images here and once when there was a cluster of quickly moving red pixels in that exact area.

Thanks for reporting this. You may see the white lines at some point. Way more fleeting and difficult to spot.

 

[anthony13]

I have noticed my white lines are typically about 2 inches below and 6 inches to the right of my cursor. they also almost always appear on the right side of the screen. Which reminds me of one time, when I turned on my computer, the right half of the screen did not have True Tone enabled, while the other half did. got me wondering about True Tone, a new feature on these iMac's. does everyone have it enabled or do some have it disabled?
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scratch that, as I posed that my left side of the screen had a white line glitch

 

[tjramage]

Has anyone received any follow up contact from Apple after their initial communication? Just trying to gauge how proactive and attentive they are being to these issues. Certainly by this point their engineers have experienced the problems listed here first hand. It’s mind numbing to think they missed them before the release to begin with.

I noticed this post on the Apple support forums...

 

[Simon2020]

Hi, just got my i7/5700XT with 8Gb of RAM yesterday. I had been following this thread so didn't add by 3rd party ram. Over a 2 hour period I had the white flickers twice. Both times only effected the background to the right margin of an open window about 1/3 from the bottom of the screen. Truetone was on. It must be software as it only affected the background rather than the whole screen horizontally. Only did it for 0.5sec.

Reminded me of a bug in the G3 dual 450 Power Mac with the Radeon card. In Flash 3 when you were within the app any cursor movement while drawing produced similar lines. It was a driver issue, at the time Apple told me to disable the graphics card extension in OS 9.5 which rendered it useless.

Had GPU failures in old ibooks, in those cases lines went completely across the screen.

Last night software update had a 3.2Gb compatiability update for iMac 2020. Not tested since then.

 

[dspdoc]

Hi, just got my i7/5700XT with 8Gb of RAM yesterday. I had been following this thread so didn't add by 3rd party ram. Over a 2 hour period I had the white flickers twice. Both times only effected the background to the right margin of an open window about 1/3 from the bottom of the screen. Truetone was on. It must be software as it only affected the background rather than the whole screen horizontally. Only did it for 0.5sec.

Reminded me of a bug in the G3 dual 450 Power Mac with the Radeon card. In Flash 3 when you were within the app any cursor movement while drawing produced similar lines. It was a driver issue, at the time Apple told me to disable the graphics card extension in OS 9.5 which rendered it useless.

Had GPU failures in old ibooks, in those cases lines went completely across the screen.

Last night software update had a 3.2Gb compatiability update for iMac 2020. Not tested since then.

That supplemental update does not fix these issues.

 

[Haplodepatrijn]

And until this very moment they keep shipping these faulty machines ? wonder if the staff in Apple stores would warn you when choosing this configuration.

 

[dspdoc]

And until this very moment they keep shipping these faulty machines ? wonder if the staff in Apple stores would warn you when choosing this configuration.

Ha ha! No way are they ever going to give a heads up regarding issues with any of their products. I bet that if you were in an Apple store right now, not one employee would have the slightest clue this is even a ‘thing’. This includes their ‘geniuses’.

Thanks for the chuckle though!

 

[ADGrant]

And until this very moment they keep shipping these faulty machines ? wonder if the staff in Apple stores would warn you when choosing this configuration.

? Most of them probably don't know about the problem and even if they did, they are unlikely to say anything. It's not like they warned people not to buy MacBooks during the Butterfly Keyboard fiasco.

 

[Simon2020]

That supplemental update does not fix these issues.

Does the bug occur with the Bigsur beta or Windows?

 

[dspdoc]

Does the bug occur with the Bigsur beta or Windows?

BS beta, yes. Windows, no idea.

 

[ADGrant]

Does the bug occur with the Bigsur beta or Windows?

Big Sur yes, Windows no. Also, on MacOS some have reported it doesn't happen in games.

One other thing I have noticed, it seems to happen more often when I hold down my finger on my trackpad and drag.

 

[Simon2020]

Big Sur yes, Windows no. Also, on MacOS some have reported it doesn't happen in games.

One other thing I have noticed, it seems to happen more often when I hold down my finger on my trackpad and drag.

Its got to be a driver issue. On both occasions it did it, it only affected the desktop image and not the active window. A hardware fault would just effect an area and not be content aware?

 

[ADGrant]

Its got to be a driver issue. On both occasions it did it, it only affected the desktop image and not the active window. A hardware fault would just effect an area and not be content aware?

Probably. It just happened a few times today in a Citrix session I have open to a Windows 7 VM. Even there, it hasn't affected the active Windows Window. Also my GPU memory consumption is at 50% which is a lot when you have 16GB.

 

[tjramage]

Its got to be a driver issue. On both occasions it did it, it only affected the desktop image and not the active window. A hardware fault would just effect an area and not be content aware?

I see what you're saying, but not sure it adds up... I have experienced the white line glitch within fullscreen applications as well as just the desktop area.

 

[kkh]

I see what you're saying, but not sure it adds up... I have experienced the white line glitch within fullscreen applications as well as just the desktop area.

Same here but with an interesting similar quality. Take Illustrator for example. Illustrator, for those not familiar with it, has an artboard that you create your design or art in. This artboard floats on top of a larger background or canvas that is a part of the interface. I have not seen the white lines cross the artboard into whatever I've been working on. I have only seen the lines in the surrounding background. So, they seem to not cross the front-most or "in focus" part of the interface in any situation. Anybody else seen anything that contradicts this?

 

[ADGrant]

Same here but with an interesting similar quality. Take Illustrator for example. Illustrator, for those not familiar with it, has an artboard that you create your design or art in. This artboard floats on top of a larger background or canvas that is a part of the interface. I have not seen the white lines cross the artboard into whatever I've been working on. I have only seen the lines in the surrounding background. So, they seem to not cross the front-most or "in focus" part of the interface in any situation. Anybody else seen anything that contradicts this?

That makes sense, the art board is probably the active window in that app.

 

[dspdoc]

Same here but with an interesting similar quality. Take Illustrator for example. Illustrator, for those not familiar with it, has an artboard that you create your design or art in. This artboard floats on top of a larger background or canvas that is a part of the interface. I have not seen the white lines cross the artboard into whatever I've been working on. I have only seen the lines in the surrounding background. So, they seem to not cross the front-most or "in focus" part of the interface in any situation. Anybody else seen anything that contradicts this?

I’ve noticed the same behavior. Hoping for a fast supplemental driver update to Catalina. I know, I know, I said fast. ? ?

 

[Simon2020]

With this second monitor fix/hack, has anybody connected one and still got the white lines?

 

[dspdoc]

With this second monitor fix/hack, has anybody connected one and still got the white lines?

I’ll be able to report back on that come Wednesday.

I am still completely puzzled by this and why it would ‘remedy’ the issues.