Dell U3219Q does not detect after macOS 12.1 update
| Originator: | brendan | ||
| Number: | rdar://FB9809866 | Date Originated: | 2021-12-15 |
| Status: | Open | Resolved: | |
| Product: | macOS | Product Version: | 12.1 |
| Classification: | Reproducible: | Always |
Immediately after the macOS 12.1 update my two Dell U3219q displays no longer are detected when connected in USB-C mode. If I connect to them over HDMI or DisplayPort (via USB-C) they work, but the USB-C charging + display mode they only detected as a charger and show no picture (black screen, searching for signal). I believe this was likely related to the changes around USB-C charging + display listed in the release notes as “External displays may not charge some MacBook Pro and MacBook Air computers when connected using Thunderbolt or USB-C”. This broke my critical workflow and there appears to be no viable solution beyond connecting over DisplayPort instead.
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