Apple has posted a document related to an iPad Pro issue. Recently, some users reported that they experience an unresponsive and the black screen issue on iPad Pro after charging. They complained about this issue on Apple Support Community. Some of them have tried to do some common troubleshooting, like resetting and restoring their iPad Pro. Related to this issue, Apple finally released a document, titled “If your iPad Pro stops responding and the screen is black.” The document provides the short guide for users to solve that problem.
Apple recommends to force restart by pressing and holding both the Sleep/Wake and Home buttons for at least ten seconds, until you see the Apple logo.
Of course, Apple has to investigate this issue further, considering the iPad Pro is their new flagship for the iPad series. The Users expected that it’s only the iOS issue that need to be fixed through software update only.
At the end of the document, Apple wrote: “Apple is aware of this issue and is investigating.” Apple also said that they will update the document if there is any additional information about this issue.
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I don’t think any of these are going to solve the problem. By all means update all software to the latest, this should be done as a matter of course. I suspect the cpu is busy for a little while apps are being refreshed in the background. It seems that by default all background refreshes are enabled. Disable them all to stop the cpu from being distracted while writing to the screen. Then slowly enable the backround refresh by app until you find a single app that hogs the cpu or you’ve reached a number of background refresh enabled apps that brings the cpu to its knees again. This has worked for me. I have found single apps that cause the freeze. There is also a limit in the number of apps, in my case 8, which is heavily (and unpredictably) dependent on the combination and type of apps.