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user_2xmbnv
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Saturday, July 11th, 2026 11:42 PM

XB10 5 GHz causes Linux Intel Wi-Fi to fall back to 54 Mbps

My XB10’s 5 GHz radio causes a Lenovo laptop running Zorin OS Pro with an Intel iwlwifi adapter to fall back to a 54 Mbps link rate. The kernel repeatedly logs:

required MCSes not supported, disabling HT

Signal strength is excellent, approximately −42 dBm. The same laptop connects normally to a phone hotspot at 144 Mbps and to the XB10’s 6 GHz BSSID at approximately 1.9–2.1 Gbps. The behavior occurs with both Linux kernels 6.17.0-20 and 6.17.0-35.

XB10 5 GHz BSSID affected: [Edited: "Personal Information"]

XB10 6 GHz BSSID working correctly: [Edited: "Personal Information"]

Locking NetworkManager to the 6 GHz BSSID resolves the problem. Please escalate this as a possible XB10 5 GHz firmware/MCS-advertisement interoperability issue.

Thanks

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11 hours ago

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XfinityRaf

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12 hours ago

Good evening @user_2xmbnv. Are you seeing any issues with other devices on your network? 

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user_2xmbnv

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Sorry I will re-post publicly.  

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12 hours ago

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user_2xmbnv

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I see the exact same issue with both machines running Linux.  One running Linux Mint, the other Zorin OS.  One is a Lenovo Yoga 2 years old, the other is a Samsung Book3.  

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12 hours ago

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XfinitySeth

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Okay gotcha. Connection speeds for Linux devices using Wi-Fi adapters can drop for various reasons that include the distance from the gateway, interference from nearby networks, and the performance of the adapter itself. Seeing as how the connection is only dropping on Linux devices and resolves itself locking into the 6GHZ SSID, there could be a compatibility disconnect between the adapter and the devices themselves.

Some things you'd want to ensure are that the Wi-Fi adapter has the latest drivers, but we're always happy to pass the feedback you provided along as well and appreciate it 👍

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11 hours ago

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user_2xmbnv

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11 hours ago

Not sure how to post publicly vs non-publicly ??

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