# ATTENTION - iOS 12.3.1 - UPDATE affects External Display

**URL:** https://www.tagtool.org/t/attention-ios-12-3-1-update-affects-external-display/1470
**Category:** Support
**Tags:** troubleshooting, networking, external-display, ipad
**Created:** [June 25, 2019, 11:50am UTC](https://www.tagtool.org/t/attention-ios-12-3-1-update-affects-external-display/1470 "2019-06-25T11:50:27Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![iink](https://cdn.tagtool.org/user_avatar/www.tagtool.org/iink/32/133_2.png) [@iink](https://www.tagtool.org/u/iink)
#### Post date: [June 25, 2019, 11:50am UTC](https://www.tagtool.org/t/attention-ios-12-3-1-update-affects-external-display/1470/1 "2019-06-25T11:50:27Z")

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Dear Tagtoolistas,

The recent iOS 12.3.1 Update affects the external display. On the new iPad Pros with USB-C the display freezes and is not useable. On older devices it works, but you cannot reconnect an external display once the session is up and running.

Using Airplay is not affected by the update - this seems to work.  
iOS 12.0.1 seems to be stable.

We are looking into the problems and are working on a fix.

If you need the external display - you better do not update your device.

best,  
Mat

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<div class="post-metadata">

### Author: ![iink](https://cdn.tagtool.org/user_avatar/www.tagtool.org/iink/32/133_2.png) [@iink](https://www.tagtool.org/u/iink)
#### Post date: [June 25, 2019, 11:51am UTC](https://www.tagtool.org/t/attention-ios-12-3-1-update-affects-external-display/1470/2 "2019-06-25T11:51:01Z")

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### Author: ![Clifford](https://cdn.tagtool.org/user_avatar/www.tagtool.org/clifford/32/597_2.png) [@Clifford](https://www.tagtool.org/u/Clifford)
#### Post date: [July 10, 2019, 6:12pm UTC](https://www.tagtool.org/t/attention-ios-12-3-1-update-affects-external-display/1470/3 "2019-07-10T18:12:43Z")

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Thanks for the info, much appreciated!

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<div class="post-metadata">

### Author: ![iink](https://cdn.tagtool.org/user_avatar/www.tagtool.org/iink/32/133_2.png) [@iink](https://www.tagtool.org/u/iink)
#### Post date: [August 1, 2019, 8:33am UTC](https://www.tagtool.org/t/attention-ios-12-3-1-update-affects-external-display/1470/4 "2019-08-01T08:33:39Z")

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![09](https://cdn.tagtool.org/uploads/default/original/1X/c24ba4763129d5bb47fcc57b08ed2c0be4159cf6.png)

I tested the new iOS 12.4 and the re-connection of an external display during a session works again.  
Have not tried the new iPad Pro with USB-C so far.