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This has been going on for MANY years/versions of Illustrator and I've seen many posts here about the issue but it's yet to be resolved or have any work arounds.
All you have to do to replicate the bug is to hit alt (don't even need to hold it) and assuming you're on a high refresh rate monitor you will instantly feel input lag and see the cursor moving at what appears to be 30fps or less, until you left click with mouse, then it will go back to normal. When you hit ALT there should be no difference in the rendering of the mouse cursor. It should feel and look just as smooth as before you hit ALT.
While this isn't a program breaking bug it's still annoying nonetheless. When you're used to moving the mouse at a certain speed and you hit alt to duplicate or whatever you want to do the mouse instantly feels off/slow and it really breaks down the smoothness of the program to me since ALT is a very critical hotkey.
Please work on fixing this next update.
This happens on newest version 28 and has happened on every version of illustrator as far back as I can remember over 8 years. Win 11 64 bit fully updated but again happened on Win 10 64 bit also. This is NOT an operating system specific issue. This is a bug within the Adobe Illustrator engine.
For anyone on google searching about this issue. I figured out what was causing it. It's a bug that's been around since before 2010. It's a Windows/Adobe bug AFAIK. Hitting ALT highlights the menu in all programs. This is an old way of navigating through menu's without using a mouse. You can sort of turn this off in Windows 11 under Accessibility/keyboard/underline access keys but this doesn't fix the issue in Adobe programs. Again Adobe is bypassing that setting for some reason. NO ONE is using
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Hello @Atmo_nS,
We understand that encountering technical issues can be frustrating. I was unable to replicate this behavior on my end. Would you mind sharing some more details, like the exact version of the OS/Illustrator, system config (CPU/GPU/Memory), a sample file (https://adobe.ly/3S3LaKD), and a screen recording of the problem (https://adobe.ly/3Frxly8), so we can investigate this further?
Looking forward to hearing from you.
Thanks,
Anubhav
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Thanks for the reply. I will send everything you asked for, but again this has been going on for a long time and if you just google "laggy cursor alt" you will see many others with same issue. I know you have to go through these steps though in order to figure it out.
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By looking up some old youtube videos (6 years old btw lol). I've seen the only fix was disabling GPU Performance. This is a bandaid and not a fix as I love using the GPU Performance and some of the settings that go along with it. So the ALT cursor bug lies somewhere there in the GPU Performance.
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For anyone on google searching about this issue. I figured out what was causing it. It's a bug that's been around since before 2010. It's a Windows/Adobe bug AFAIK. Hitting ALT highlights the menu in all programs. This is an old way of navigating through menu's without using a mouse. You can sort of turn this off in Windows 11 under Accessibility/keyboard/underline access keys but this doesn't fix the issue in Adobe programs. Again Adobe is bypassing that setting for some reason. NO ONE is using these programs without a mouse in 2023 lol, they need to patch this.
The issue is for some reason when these menu's are selected within photoshop it triggers a lower framerate of the mouse and thus the bug this post is about, it also causes issues with other tools and Adobe programs. The only way to disable it is with an auto hotkey script or a script that runs preventing it from happening. As far as I can tell there is an issue that Adobe programs have where they can't tell the difference between physical keys being hit and virtual ones, but I don't know the specifics.
The fix was found in this video here. I downloaded the exe he links in the video description because I didn't want to run or mess with AutoHotKey at all. It fixed my issue described in my OP 100%. I still think there is a way for Adobe to patch this or allow for an option within the menu to disable that ease of access ALT button if you want. For years people were having this issue in Photoshop as well and someone else created a program to fix it also. It was called APsisstant and it did the same thing the program I linked above does but was taken down for some reason a while back so people just reverted to using AutoHotKey to trick Adobe into thinking the ALT key wasn't pressed.
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This solution worked great for me. Even though this is an old topic, the problem only recently showed up. It would only happen on Illustrator and Photoshop windows. As soon as my mouse slowly made it off the edge of the respective window, it would return to normal speed. Within Illustrator or Photoshop, the cursor remained slow until I clicked the mouse or hit escape. This was particularly frustrating when using the clone stamp and similar tools that required using the alt key heavily.