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No VCP features available with CAC-2505

Updated on 25-09-2026 in Adapters and Cables.
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2 0 on 07-09-2026
PVVC

Hello, I just got the CAC-2505 USB‑C® to HDMI™ 2.1 Adapter 8K60Hz adapter. It works great at the native 4K@144Hz of my monitor. Even without DSC, which is nice (Laptop only has DP Alt 1.4 mode, monitor has HDMI 2.1). Also with variable refresh rate support.

I though it was the perfect adapter. Before that I used a CableMatters USB-C to 8K HDMI® Cable (201392-BLK-3). That also did 4K@144Hz without DSC – but did not support VRR.

Now the downpart: I am unable to use VCP features with the CAC-2505 adapter. Like set the monitor’s brightness via Tools like Monitorian or NirSoft’s ControlMyMonitor.

Which is very sad – that worked before using the native HDMI port or the CableMatters USB-C connection. Is that something that a firmware update might solve in the future?

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0 0 on 07-09-2026
PVVC

Here is the output with the CableMatters adapter cable, where VCP works:

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0 0 on 25-09-2026
ramsaybolt

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