When working with hi-res Black and White Bitmaps Illustrator goes to CPU preview disabling GPU Animated / Scrubby Zoom.
When using hi-res BW bitmaps, 'Scrubby Zoom' or 'Animated Zoom' disables itself even if it's enabled in preferences. This happens after roughly 1 or 2 seconds after opening a file with this kind of images. The window goes from CMYK/Preview mode to CMYK/CPU mode as if it was in Separations Preview or CPU preview, even though it wasn't set to either of those. View>View Using GPU becomes grayed out so I can't go back.
This bug is happening on a file with 2 1200dpi bitmap 5"x5" (embedded and/or linked), each under 1MB in size, making the Illustrator file 3MB total, included as sample to test. A 5"x5" 600dpi 74MB CMYK linked or embedded file does not have the same issue. Screen shot of both as additional proof. This bug is also happening on a smaller file Illustrator file, it has two 8.5x11 embedded 300dpi Black and White Bitmap tifs.
I can reproduce this problem on both regular and beta Ilustrator versions on Windows 11 version 22H2, Intel i9 10850k 32GB ram, Nvidia RTX3090 24GB vram. This bug does not occur on a Macbook Pro i9 9980h 32GB ram, AMD 5500m 8GB vram on macOS Ventura 13.0.1. (It can get laggy with many BW hi-res bitmap images but never switches it's self to CPU graying out the GPU option)
This is very strange because this seems like an error that should happen if you run out of VRAM or if the GPU can't handle. Yet the RTX in the PC has 3x as much VRAM and is nearly 500% faster compute than the 5500m. Windows is up to date with latest update 11/14/2022. Nvidia Studio drivers are also latest with update from 12/8/2022.
Mark R
shared this idea
Please check if this bug still happens in the latest Beta release, 27.6.0.120
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Adriano De Fazio commented
Hi Mark!
This problem happens to me too.
Did you manage to solve it? -
Roy
commented
Hey Mark - Just wanted to say you are not alone. I downloaded your sample AI file and immediately got the GPU problem and it greyed out. You didn't mention what version of Illustrator you are using but I am assuming 27 as well.
I also have Illustrator 26.2.1 installed and in that version, your file works perfectly fine with 100% full GPU acceleration. The problem is not your well spec'd out computer that's for sure.
For an experiment, install a previous version of Illustrator and let me know if you see the same thing.
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Here's a sample file where this bug is happening
![CD Face [CDBO120]-Asmereir.ai](https://assets.uvcdn.com/pkg/icons/files/default-sm-0cef6018a827be3ab2ea6d3f2f15c8f8aec45cbb4e04b84be42d172e9a83870b.png){kind=icon}
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