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iMac 2020, 5700XT - graphical glitch?
- Thread starter torifile
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Not seen it here.
Apple can run a trace of exactly what's going on, find the conflict and help you remove it — or tell you that there's none and that Engineering is working on it — or escalate to Engineering.
To make any of this happen, you need to initiate a phone support call on Apple's support site. It's free and they usually call back within 10 minutes of the request. Let us know what they say.
Apple can run a trace of exactly what's going on, find the conflict and help you remove it — or tell you that there's none and that Engineering is working on it — or escalate to Engineering.
To make any of this happen, you need to initiate a phone support call on Apple's support site. It's free and they usually call back within 10 minutes of the request. Let us know what they say.
I'm also seeing this after installing Big Sur and I have the regular 5700 (not the XT version).
Is that True Tone on the left, non-True Tone on the right?
I get this (on Catalina, and on the 5500 XT) when switching resolutions. Try toggling True Tone on and off – does it reset it?
Anybody seen this kind of issue? Whole screen is split in half, and both halves show exactly the same left half duplicated. Only occurred once and the issue disappeared after log out.
- Big Sur (11.0.1)
- iMac 5K 2020, iMac (Retina 5K, 27-inch, 2020)
- 3.6 GHz 10-Core Intel Core i9
- 64 GB 2667 MHz DDR4
- AMD Radeon Pro 5700 XT 16 GB
Bought this one five days ago, so I am really considering whether or not to return it.
- Big Sur (11.0.1)
- iMac 5K 2020, iMac (Retina 5K, 27-inch, 2020)
- 3.6 GHz 10-Core Intel Core i9
- 64 GB 2667 MHz DDR4
- AMD Radeon Pro 5700 XT 16 GB
Bought this one five days ago, so I am really considering whether or not to return it.
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Probably just a software issue. If it happens again, check the Displays preferences panel. Does it show two displays as mirrored? Instead of log out, try sleep/wake.Anybody seen this kind of issue? Whole screen is split in half, and both halves show exactly the same left half duplicated. Only occurred once and the issue disappeared after log out.
- Big Sur (11.0.1)
- iMac 5K 2020, iMac (Retina 5K, 27-inch, 2020)
- 3.6 GHz 10-Core Intel Core i9
- 64 GB 2667 MHz DDR4
- AMD Radeon Pro 5700 XT 16 GB
Bought this one five days ago, so I am really considering whether or not to return it.
I have a 128GB (Crucial RAM) 5700xt model and have the same issue during shutdown. I vaguely remember that when the iMac 5K first came out, there were reports that Apple had to use something like 2 video controllers to control the display due to its size and no single controller being able to handle a 5K display at that time. They did some magic to synchronize the two display halves so it was usually not noticeable.
That being said, I wonder if the same technology is in use today and during shutdown, we're just seeing some artifacts related to that. I also notice that your Dock is halfway off screen. Mine does the same thing during shutdown.
I don't think this is a glitch or bug but just likely a result of behavior during shutdown.
Hello,
Did you ever get the flash issue resolved? I just wrote the forum about the issue because I am thinking of getting a 2020 27 inch iMac with your configuration. I got one response from some one that said "There was an update quite a while back that was meant to have a fix for this and did indeed fix it for my iMac. Whether others are still having issues after the update I can’t speak to, but I had graphical issues and no longer do."
Please let me know if and/or how the issue was resolved for you.
Thank you!
I'm having this exact issue, except I have a 5300 model GPU.
Happened once yesterday, and once again today. Both times I noticed it while watching youtube, since the dark-mode webpages make it stand out.
I've had the machine since launch-week. I often run a graphics tablet through USB-C, so I tried taking screenshots on the 5K display while the issue was happening, and loading them up on the tablet, and the line doesn't appear on the screenshot. So it's definitely not a bottom level OS issue. I'm thinking it might be a GPU software/firmware issue, since it doesn't persist through a power cycle like a damaged screen would, and at the same time, it doesn't look like a backlighting issue at all.
Hopefully we see a patch for it soon, for peace of mind more than anything else. I just wanna know it's fixable through a patch, and not a damaged display problem.
What did Apple say when you contacted them and they logged into your machine so they could see the problem?
Or haven't you done that yet? If you can see it they should be able to — unless they can't and that's important, too.
The support call is free but you have to initiate the call-back request on Apple's support website. I've never had them take longer than 10 minutes to get back to me.
just as iMacPro fixed month ago with month long service which they had to replace it in end only good thing out of that iMac Pro now 10 core and warranty reset
but now my iMac starts playing up
No longer safe to keep Mac over 3yrs
but now my iMac starts playing up
No longer safe to keep Mac over 3yrs
update
replaced iMac 2020 logic board & screen atleast onsite this time around , not game to install Big Sur just yet
Was also getting gpu kernel panic and spit screen in windows/macOS shutdown/ coming out standby before too
replaced iMac 2020 logic board & screen atleast onsite this time around , not game to install Big Sur just yet
Was also getting gpu kernel panic and spit screen in windows/macOS shutdown/ coming out standby before too
I get the two-color screens on shutdown too - worried its a panel fault (5700xt). I called apple and the guy was totally clueless. He said reset pram after consulting seems like 20 people. Haven't done so yet as I really doubt it will make a difference. I'm not saying its an "issue" I just want to know if there is an underlying issue or if its just an "artifact".
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But you haven't done it yet so you don't know.
Why not reset the NV RAM and then tell us whether or not it worked?
Mine has never had this issue.
start appearing again this time just after awaking sleep on mac os catalina Upgrade the Big Sur today on iMac 2020 see how it goes
You’re the first person I have found that has the same problem, I was writing about it Apple discussions forum but have no answers as to whether it’s a Hard or Software problem as of yet. I don however know how to get rid of the problem for now, in case you haven’t found out already.Anybody seen this kind of issue? Whole screen is split in half, and both halves show exactly the same left half duplicated. Only occurred once and the issue disappeared after log out.
- Big Sur (11.0.1)
- iMac 5K 2020, iMac (Retina 5K, 27-inch, 2020)
- 3.6 GHz 10-Core Intel Core i9
- 64 GB 2667 MHz DDR4
- AMD Radeon Pro 5700 XT 16 GB
Bought this one five days ago, so I am really considering whether or not to return it.
its a HD/Safari/Netflix Problem, you can check out my videos below in the links. It’s when Safari can’t handle the Netflix HD Movie Mode - DolbyVision. Simply go into Safari und the „Developer“ menu >Experimental Features and unclick „HDR Media Capabilities“. it’s a temp fix as you can’t watch in HDR any more but fixes the problem short term.
Let me know if you have any new information.
So I’ve got a True Tone problem that is seemingly getting worse. The machine randomly turns True Tone on and off, and sometimes even says it is on even when it is not. Today I had to restart the machine to get True Tone to turn on at all. This is the only problem I have, but it is getting annoying.