![]() Service:, total successful checkins since load (6130 seconds ago): 614, last successful checkin: 0 seconds ago Panic(cpu 2 caller 0xffffff7f9cb9dad5): userspace watchdog timeout: no successful checkins from in 120 seconds ![]() I've tried a completely fresh install of Catalina, but that didn't resolve the issue. It's impossible to downgrade a 16-inch MBP to Mojave because it shipped with Catalina, so I'm stuck without any remedy here. I repeated the process 6 times just to be sure, and each time my computer kernel paniced with this error within 30 seconds every time. Using this method I was able to cause my laptop to kernel panic with this error within 30 seconds of playing the video. ![]() In the menu bar, click "View" and then "Loop" so the video plays repeatedly.Go to this link and download the 4K video:.This will make it so that your dedicated GPU is always in use. (If you have a laptop) Open System Preferences, then go to Energy Saver, then deselect "Automatic Graphics Switching" at the top.Here are steps you can do to reproduce the issue on your Mac running Catalina: This is further evidenced by the fact that many of the applications I experience the crash while using require the discrete GPU to be used (and some especially tax it), as well as other users experiencing the crash when they plug their Mac into an external monitor, which likely triggers a switch to or more heavily involves the discrete GPU. ![]() My guess is the issue stems from the Mac's use of the discrete GPU, probably the GPU driver because this issue began with a software (or potentially silent firmware) update and, according to others on the Apple Support Threads, is occurring on dozens of different models, meaning different GPUs. ![]()
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