Mark Peterson
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Just adding my voice to this. Adobe posted an announcement, one of several scrolling announcements, titled "FAQ: How to fix 'Display Acceleration Disabled' in After Effects," at (https://community.adobe.com/t5/after-effects/bd-p/after-effects?page=1&sort=latest_replies&filter=all). In it, they say Nvidia driver 442.92 seems to be the issue. I have confirmed this for my situation. That driver, or later, not only causes the Display Acceleration Disabled message, but locks AE if you attempt playback using the space bar, such that you have to force-close AE to get it to stop or even to respond to anything at all. Furthermore: 1) if you go into AE Preferences / Display, "Hardware Accelerate Composition, Layer, and Footage Panels" is both unchecked and greyed out. 2) If you go into Previews / GPU Information, Fast Draft gives "Not Available (incompatible device or old graphics driver)" and the Texture Memory is set to 0 MB and is greyed out. If you uninstall that Nvidia driver version and then reinstall an older version (I went two versions back, to 441.28, to be safe), everything works as it should and is back to normal, including points (1) and (2) above. NOTE: Since the 442.92 (or later) drivers do NOT cause problems in the latest version of Premiere Pro, I would say the issue is more with AE than with Nvidia, and Adobe should fix it...