Wednesday, September 3, 2025

hdmi – System Settings doesn’t acknowledge show mannequin or listing appropriate decision

I’ve two HP E243i shows plugged right into a USC-C hub which is plugged into an M1 Professional MacBook Professional operating macOS 15.5. One of many shows works high quality. It exhibits up in System Settings > Shows as an HP E243i show, with quite a lot of obtainable resolutions, together with the proper default of 1920 x 1200.

A screen shot of the Displays Settings for macOS, showing the resolution list for an HP E243i display, including a default of 1920 x 1200

Nonetheless, the second show, regardless that additionally it is an HP E243i, exhibits up in system settings with no title and with solely two obtainable resolutions, 1280 x 720 (the default for some motive) and 1920 x 1080.

Another screen shot from the Display Settings for macOS, this one showing a display with no name, and only two available resolutions, 1280 x 720 and 1920 x 1080

Since this can be a 1920 x 1200 show, both of those two decision settings (which aren’t even the proper facet ratio) are visibly stretched.

Issues I’ve tried:

  • Swapping the HDMI cables
  • Plugging immediately into the laptop computer
  • Manufacturing facility reset on the show
  • Restarting the laptop computer

Nothing will get macOS to make 1920 x 1200 obtainable for the show. Weirdly, one explicit mixture of hub/port does get the damaged show to point out up with a reputation “1080p60” and with extra decision choices, however nonetheless not 1900 x 1200.

The 2 shows are the identical mannequin however do have a unique Rev/Firmware model. The damaged one is AVM121 whereas the engaged on is DIM111. That mentioned, there are different AVM121 shows in my workplace, and people all work high quality, so I do not suppose that distinction is related.

Utilizing Show Port as an alternative of HDMI will not be an choice. Changing the entire show would possibly be an choice, however I might relatively keep away from it if I might.

So anybody have any concepts? Both a strategy to repair macOS or this show or to workaround the difficulty and pressure macOS to make use of it as 1920 x 1200?

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