Slow speed on Linux laptop

My laptop unfortunately doesn't have an ethernet port, or I'd plug in right away. I replaced the wifi chip after problems began and I couldn't find a software or configuration issue.

I appreciate those details @phiboy! It also really helps to know this only happens when connected to the home network. Is this the only device having issues?

Yes, my other devices are fine on my home network.

Do you know if Linux had an update around the time this issue started @phiboy?

I didn't have a major update. I did have the same issue across multiple distros, though, so this doesn't seem to be limited to a particular distro or kernel. It looks like the other users in this topic are doing similar troubleshooting steps, maybe we can find something causing an issue that's across all of us.

• My gateway is model CGM4331COM, have there been any updates or changes to its firmware recently?
• Has Xfinity done any upgrades to its infrastructure that could impact some users?
• I've had this issue in Fedora and Mint, both only on my home network (as reported by the other users, other networks are fine). Is there some kind of trigger in my gateway or network that could have issues with a particular OS?
• Another user believes that the router sets the width to 20. Is that something that can be adjusted to test?

Where can you see the width?

And which distro are you on? Just trying to find if there's some commonality between those of us having this issue.

@Parad0x763 Thanks for reaching out to us regarding your internet speed. I do apologize for any inconvenience this may have caused you, and I would be more than happy to assist you today.  Please send us a direct chat message with your full name and complete service address to “Xfinity Support”. To do so, click on the chat icon located at the top right of this forum's page.
 
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Please circle back here and post any possible solutions for the issue here in these open public forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.