Acer Nitro AN517-55 HDMI not working with KVM switch, only USB-C works with iGPU

danielrs21

I bought a KVM switch with HDMI and USB ports to connect another PC to my Acer Nitro AN517-55 laptop.

The problem is that I can't get it to work using the laptop's HDMI port. If I connect it with a converter to the rear USB-C port (the port next to the HDMI port), it works, but this doesn't work because it doesn't use the NVIDIA graphics card through this output, but rather the integrated Intel one.

The switch I have is this one: https://www.amazon.com/-/es/Conmutador-conmutador-computadoras-dispositivos-impresora/dp/B092PWBV1D/ref%3Dsr_1_6?__mk_es_US=%C3%85M%C3%85%C5%BD%C3%95%C3%91&sr=8-6

My external monitor normally operated at 120Hz. I tried connecting it directly and lowering the rate to 60Hz because the switch seems unable to go higher than that, but I still can't get it to work. It connects immediately with the other PC.

Can you help me understand how to solve this? Or if the switch must meet some specific feature that the one I have does not have?

Axxo

The Acer Nitro AN517-55 may have compatibility issues with certain KVM switches when using the HDMI port. This can be due to a variety of factors including the KVM switch's compatibility with wireless dongles, USB versions, or the switch's overall transmission capacity. Additionally, the display settings on the laptop, the HDMI cable itself, or even the laptop's HDMI port could be the source of the problem.
Here's a more detailed breakdown of potential causes and troubleshooting steps:-

1. Compatibility Issues:
KVM Switch Compatibility:
Some KVM switches have known issues with specific devices or connection types (like wireless dongles).
USB Version:
Using older USB 1.1 devices with a KVM switch might lead to compatibility issues, as USB 2.0 or 3.0 are generally more compatible.
Transmission Capacity:
The KVM switch might not have enough bandwidth or capacity to handle the data transfer needed for your setup, especially with higher resolutions or refresh rates.
2. Laptop-Specific Issues:
Display Settings: Make sure the correct display mode (Duplicate or Extend) is selected on your laptop when using the KVM switch.
HDMI Cable: Test with different HDMI cables to rule out cable-related issues.
HDMI Port Damage: Inspect the HDMI port on your laptop for any visible damage.
Outdated Drivers: Ensure your graphics drivers are up-to-date.
Sleep Mode: Ensure your laptop doesn't go to sleep or enter a power-saving mode that could interrupt the connection.
3. Troubleshooting Steps:
Reconnect and Reboot: Try disconnecting and reconnecting all devices (laptop, KVM switch, monitors) and rebooting your system.
Test with Direct Connection:
Connect the monitor directly to the laptop's HDMI port to verify that the monitor and cable are working correctly.
Try a Different KVM Switch:
If possible, try using a different KVM switch to see if the problem is with the specific switch you are using.
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