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Enabling Antenna Aggregation Might Make Big Difference If Your Laptop Has An Intel Wifi Card.

This is swiped from reddit but I thought it was really helpful so please don’t judge me too harshly lol.

So it turns out that some Linux distros don’t enable this by default for whatever reason but if you have an Intel wifi card that uses the iwlwifi driver (you can check this with lspci -k and look for a section that says Network controller: Intel Corporation and Kernel driver in use: iwlwifi under it), you can add a simple line to a config file that might make a huge difference to your wifi speeds.

Just edit /etc/modprobe.d/iwlwifi.conf (if it doesn’t exist just create it) and add the line: options iwlwifi 11n_disable=8 then reboot. I ran Speedtest before and after trying this on my laptop and it seems to have increased it by about 20% or so.

Your mileage may vary of course, but hopefully this helps someone!

drwho ,
@drwho@beehaw.org avatar

Thank you for posting this, I’ll give it a try tonight.

CrabAndBroom OP ,

No worries! From other comments and a couple of tests I did it seems to get somewhat mixed results, but it’s easy enough to undo so you might get lucky! It worked for me at least lol.

henfredemars ,

Just throwing this out there: on my hardware, this improves my upload but hurts my download speeds. There could possibly be reasons why it’s not set by default.

MonkderVierte ,

I think i read about this once. Something like, Windows has less strict requirements for drivers and hardware, which is why driver-side workarounds for broken hw works better there. Or something like that.

CrabAndBroom OP ,

I tried it out on another laptop since I posted this, and that had the inverse - download speeds went up by about 20% or so, but the upload speed seems have taken a hit of about 10%. On my ‘main’ laptop both improved quite drastically.

So yeah definitely a ‘your mileage may vary’ type of situation, but it’s easy enough to reverse I guess so worth a shot if anyone has a bit of a speed problem. You might get lucky!

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