Really? Thats very concerning. Has anyone else still noticed it since the 'apparent' fix of 10.15.7 ?
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iMac 2020, 5700XT - graphical glitch?
- Thread starter torifile
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Really? Thats very concerning. Has anyone else still noticed it since the 'apparent' fix of 10.15.7 ?
I have only seen this happen once. On the older version of Catalina it was every day.
There still was no fix for the weird saturation veil glitch. Sometimes my screen will appear to have whiter blacks or a lack of deep color saturation and often it'll correct on its own after login. Sometimes though, I have to turn the brightness up and it'll switch to the proper black levels and saturation, then I turn the brightness back down to desired level. Very weird.
Have you submitted feedback to Apple through the Feedback Assistant app? If not, and you have the time to do so, might be a good idea. I did, and got a response requesting a video of it happening, which I provided. I think the more of us do it the greater the likelihood someone will look at this bug.
Along those lines, don't overlook the fact that all of these iMacs are under warranty. Apple Support can log onto your machine, install a tracer and get logs of exactly what is happening and when. The tech will stay with you on the phone while you reboot then direct you how to upload the file. When you get someone personally involved, you will get a direct response.
I opened up a support ticket with Apple, for the following issue.
As I use my iMac 27" 2020, with the AMD Pro Radeon 5700 XT with 16GB 's memory,
the memory use of the GPU creeps up and pegs at 100%, within one hour of use. It stays there until I quit applications.
I am running apps but Nothing, that is Graphic intensive !
Safari, iTunes Radio, Messages, Mail, Preview, Find My and Excel Spreadsheets ( my work), and such running.
The fans then start to pick up, as heat is generated when running at 100%, of GPU memory use.
I am using iStat Menus to visually see the memory use, just creep up steadily, over the next 30 to 40 minutes.
When I quit ALL applications, the memory does go back down over the next 30 minutes,
to about 10 to 15 percent, which still seems very high, for No Graphics, other than the Desktop wallpaper.
Anyone else seeing this?
As I use my iMac 27" 2020, with the AMD Pro Radeon 5700 XT with 16GB 's memory,
the memory use of the GPU creeps up and pegs at 100%, within one hour of use. It stays there until I quit applications.
I am running apps but Nothing, that is Graphic intensive !
Safari, iTunes Radio, Messages, Mail, Preview, Find My and Excel Spreadsheets ( my work), and such running.
The fans then start to pick up, as heat is generated when running at 100%, of GPU memory use.
I am using iStat Menus to visually see the memory use, just creep up steadily, over the next 30 to 40 minutes.
When I quit ALL applications, the memory does go back down over the next 30 minutes,
to about 10 to 15 percent, which still seems very high, for No Graphics, other than the Desktop wallpaper.
Anyone else seeing this?
Not seeing this but you're doing the right thing.
Is an Apple tech actually monitoring this in person? If not, have someone call you and install one of the tracking apps they have.
I had a similar issue when OS 10.8.2 came out. The culprit turned out to be a freeware temperature monitor. It hadn't worked since Leopard but in the act of trying to load, it messed with the sensors big time.
Memory leaks can cause such issues, too. Make Engineering find it if necessary.
Mine does the exact same thing (but I have the non-XT version, i.e. 5700 with 8GB VRAM). I've heard other folks reporting this situation on these forums, and they were saying that macOS is doing a lot of caching (although it doesn't quite make sense when you're just web browsing and doing light stuff).
That said, it might be that iStat Menus doesn't report the correct figures. Afaik, they don't have official support for the 2020 iMacs yet. Is it actually possible to grab the GPU stats via the command line instead? There must be some sort of API that iStat is using under the hood.
Lastly, I checked out the GPU history in Activity Monitor (CMD + 4), but that seems to be showing the frequency of the GPU and not the use of VRAM.
Seeing the same. First time the GPU whent to 100 lightroom got very slow. So i tought it where related. But afterwards i did not see any issue. Yeah, Just beside the problem i see now in photoshop with evrything laging and images disappearing while adjusting, that is also after Just a few minutes = when the GPU gets time to warm up.
Activity monitor dosent show any high usage. So i right away tought there where problems with the istat.
But again with everything going around with the 5700xt, and also Reading there is problem with all the 5xxxx, i no longer know if i want an imac....
Returned two units with different problems.
I really dont have any knowledge about this stuff. Maybe some of the problems can be fixed with updates. But seeing the same problems from years ago and across different Machines. Im unsure. Sure it works for some.
In my case it dosent help that adobe is a big lemon on its own. So pin pointing what the problems is, is difficult.
Im not forgeting that my 2012 is running fine. Maybe better not to upgrade ?
Activity monitor dosent show any high usage. So i right away tought there where problems with the istat.
But again with everything going around with the 5700xt, and also Reading there is problem with all the 5xxxx, i no longer know if i want an imac....
Returned two units with different problems.
I really dont have any knowledge about this stuff. Maybe some of the problems can be fixed with updates. But seeing the same problems from years ago and across different Machines. Im unsure. Sure it works for some.
In my case it dosent help that adobe is a big lemon on its own. So pin pointing what the problems is, is difficult.
Im not forgeting that my 2012 is running fine. Maybe better not to upgrade ?
If I recall correctly I needed the iStat beta (6.5) to be able to see the full stats for the 2020 iMac as the prod version didn't fully support all of the reaings. It would be nice to be able to monitor GPU memory without iStat to confirm it isn't an improper reading (or GPU memory usage due to the act of constant monitoring itself) – something I may search soon.
If Mac OS treats the GPU memory like it does the primary memory, then it may just fill as much of it as it can until needing to write over stale records. This is speculative, I don't know much about how GPU memory is managed.
Anyway, replying because I've also seen this on occasion with no obvious usage cause for a GPU memory spike. But I've also seen it fix itself after some time, without the need for a reboot.
In my case I can't say I've seen a performance hit because of it, but it I did find it odd to see the bar fill up.
I loved my 27” until the screen pixelated Then blew. This is 5300 Radeon. They’re waiting on a new board and can’t tell me how long it will take. 10 days so far.Hi Guys, those of you who are using your 2020 27"iMac, I would be grateful if you could tell us how it's going and are you pleased with your purchase
They've just released the official version 6.5: https://bjango.com/mac/istatmenus/versionhistory/. From the release notes: 'Improved support for 2019 and 2020 Macs' and all sensor data is now available. I can finally ditch the 'Macs Fan Control' app.
I've just updated and can confirm that the corner issue is still present on my iMac running 5700 (non-XT).
I have a slightly different problem, which I posted here:
forums.macrumors.com
That's with a Radeon Pro 580X 8 GB in a 2019 iMac 5k. Video of glitch at link above, but here's a photo:
Help, please! GPU hardware or driver issue in 2019 5k iMac? Plus new Big Sur Photos issue…
I bought a new iMac in November, 2019. It would sometimes have a kernel panic when restarting. That went away for some time, but now it's back, intermittently—and I'm unable to find a way to reliably reproduce it. It only seems to happen when restarting, and from what I can tell, only when I'm...
forums.macrumors.com
That's with a Radeon Pro 580X 8 GB in a 2019 iMac 5k. Video of glitch at link above, but here's a photo:
Hi (bonjour),
Same thing for me on iMac 5k 2020 5700XT 16 go, corner issue solved. Bonus, BS seems faster on startup and the startup sound is back and gorgeous with those speakers.
I'm getting it in YakYak but I haven't see it in any other app. It's possibly a bug in YakYak rather than the issue itself.