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user_1j05na
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Monday, August 31st, 2026 4:17 AM

Drastically slower speeds on linux machines

Recently set up my home wireless, we have the 500 mbps plan and on every non-linux device (apple devices, windows computers, etc.) in the house they get those speeds fine. However any linux device gets speeds closer to 20-50 mbps. I have devices on Ubuntu, CachyOS, and Fedora and they all have the same issue. I've tried everything I could look up and haven't made any progress towards fixing the problem, any idea what could be causing this? I have the XB7 gateway and I'm using it alone.

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EG

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2 days ago

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user_1j05na

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I saw this post earlier, the patch described is already apart of my current system kernel (I tried to patch it manually and it was already there), and it doesn't seem to fix the issue for me. Although the issue described in that post does seem to be superficially similar to what I've been experiencing.

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2 days ago

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EG

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1 day ago

Sorry that it didn't work for you. Perhaps someone with an idea will come along. Good luck !

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XfinityDilary

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1 hour ago

 

user_1j05na Thanks for all the details. The fact that Windows, macOS, and other devices are achieving close to the expected 500 Mbps speeds while multiple Linux distributions are consistently seeing slower speeds does suggest the issue may be specific to how those devices are communicating with the WiFi network rather than the internet service itself. A few things I'd recommend checking:

 

Does the issue occur on both 2.4 GHz and 5 GHz connections?

Are the Linux devices connecting to WiFi 6 (802.11ax), or are they falling back to an older wireless standard?

If possible, test one of the Linux devices with a direct Ethernet connection to see if speeds improve.

Check whether any VPN, firewall, or power-saving settings are enabled on the affected devices.

Confirm that the wireless network adapters are using the latest available drivers and firmware for the Linux distribution you're running.

 

If all of your Linux devices are experiencing the same behavior, the adapter chipset may help narrow down the cause. Let us know the results of those tests, and we'll be happy to take a closer look with you.

 

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