External Monitor suddenly wrongly recognized
I have a Macbook Pro M1 Max and an LG UltraWide monitor 29UC88 plugged through HDMI and used as a main display. This has been my setup since I've got the laptop like 3 years ago.
This morning I worked a bit at home everything was file. Unplugged everything, worked a bit from the office where I plugged in through USB-C another terminal (wasn't the first time) and then went back home. I would say I do this once a week without problem, until today.
When I plugged back my HDMI cable, the external monitor was super scaled. Went into `System Settings > Displays > <External Monitor>` and resolution was at `1280 x 720 (Default)` and the only other option is `1920 x 1080`.
For an unknown reason, the monitor capabilities does not seem to be recognized correctly anymore and the OS doesn't let me force a resolution of 2560x1080 which is the native resolution of the LG monitor I have.
Nothing changed between this morning and when I head back to home regarding configuration nor OS updates.
I tried:
- Different HDMI cables
- Unplug/replug with very long delays (multiple minutes)
- Reboot
- Shutdown
- Updated to Sequoia 15.0.1
- BetterDisplay app
- `Detect Displays` in System Settings
It seems the monitor is not recognized correctly anymore. The monitor seems to be recognized with `"ManufacturerID"="00-00-00"` and `"ProductID"=0`:
```
$ ioreg -l | grep "DisplayAttributes"
| | | | "DisplayAttributes" = {"TiledDisplayInfo"={},"ProductAttributes"={"ManufacturerID"="00-10-fa","ProductID"=53000704963649,"LegacyManufacturerID"=1552},"DisplayAllocation"={"ExtraPipes"=0,"MainUFP"=0,"UseSingleTile"=No,"PeerUFP"=0}}
| | | | "DisplayAttributes" = {"PortID"=48,"MaximumVariableRefreshRate"=0,"MinimumVariableRefreshRate"=0,"ProductAttributes"={"ProductID"=0,"ManufacturerID"="00-00-00","LegacyManufacturerID"=0}}
```
Also, EDID retrieval through BetterDisplay didn't work, which points also in the some problem identifying correctly the monitor.
Any idea of what happened and how I can fix it? Anyways to force OSX to use a specific resolution of 2560x1080?
Regards,
matt
MacBook Pro 16″, macOS 15.0