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HP Recommended
HP Envy x360 ay0012nl
Microsoft Windows 11

I've had multiple issues with connecting with USB-C my laptop to the external monitor (Samsung Smart Monitor M7 UHD) over the past months, but I always solved them somehow. This morning I tried connecting the laptop to the monitor and it didn't work, so I thought the problem was monitor related as usual. However, I couldn't make it work and I noticed that there was an issue with device ACPI UCM-UCSI driver (code 43).

I tried uninstalling it, I tried restarting the PC, I tried updating the BIOS (which, by the way, didn't work - it said "write data register used for primary command = access failed").

I can't use the external monitor nor charge via USB-C at the moment. Any suggestions?

2 REPLIES 2
HP Recommended

@TheSwan wrote:

.... I can't use the external monitor nor charge via USB-C at the moment. Any suggestions?


@TheSwan 

 

Your machine

  • has 1 SuperSpeed USB Type-C® 10Gbps signaling rate (USB Power Delivery, DisplayPort™ 1.4, HP Sleep and Charge) port
  • uses 65 W Smart AC power adapter

You should be able to use a compatible dock to connect to use monitor and charge your machine at the same time. I know you can use HP USB-C Gen 5 dock to make a single cable solution. What is your existing dock ? Is it compatible with your machine ?

 

Regards.

BH
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>
HP Recommended

Hello and thanks for answering.

I don't use a dock to connect the monitor and the laptop, as the monitor has a USB-C port with DisplayPort capabilities and Power Delivery 65W. It usually works well. Today not only I couldn't connect the monitor, but I couldn't connect anything to that port - a USB-C hub, my phone, a USB-C charger, nothing worked.

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