Importing an image into a brand new illustrator document and embedding the image disables the GPU acceleration.
i.e. using the crop function disables the GPU.
I suspect there may be other ways the bug manifests itself, but the above process is the only one I can confirm.
Problem has persisted over many of the last few versions of Illustrator, I beleive for years.
It is critical that Adobe take this seriously.
Some large files we have received form our customers cannot be opened without this bug taking effect.
CPU preview is ridiculously slow, and not a valid workaround.
I have used Macs and Illustrator for 20 years, and have never seen an app with such abysmal performance as Illustrator with CPU preview.
iMacPro(2017) 2.3ghz 18core Xeon
Just updated to Illustrator 27.1.1.
In order to solve this, you might need to provide the files to the Adobe engineers.
This is ridiculous....
This forum will not allow an AI file attachment.
Spent 15 minutes trying to find a place to submit a proper bug report from your link.
Found a formal bug submission form.
Very frustrating when the system wont accept it.
I have wasted over an hour this morning trying to simply submit a bug report. it should not be this hard.
The link I provided is for chat support. Use it to contact an agent and get them to check your system.
Sorry- Chat did not show up initially, I am in chat now.
Thanks for reaching out. I hope the issue is resolved now. If not, would you mind sharing the original image used for placing and case no. if you contacted the support?
Kindly update the discussion if you still need assistance with it. We'd be happy to help.
I spent abut 4 hours total with Adobe support on 3 separate calls, and no, the issue was never resolved.
Adobe support was able to share my sceen and see the problem, but could not offer an immediate solution.
I suspect this is a bug of some kind.
I really cannot afford to spend more hours trying to diagnose the problem.
There is nothing special about that image. The issue happens with any jpeg that is embedded.
We are sorry for this inconvenience. Would you mind sharing the case number with me? I will check with the support team and get the required details like device info, sample AI & JPG files if you share this info.
I will forward it to the product/ engineer to further investigate the issue.
Looking forward to your response.
I'm just here to say that I've experienced the exact same issues since version 26, most of my entire work day is spent in CPU mode because as soon as my documents become somewhat complicated, Illustrator just gives up. I've literally been using Adobe products for over 20 years, and this is the first time in my career where I have to sit here and realize that every single version of Illustrator gets worse and worse. I absolutely despise that within a few minutes of working on my documents, the next time I zoom in or pan with a file with layers, it just goes straight to CPU and that's the end of it.