Constant WiFi Performance Dips, All kernels higher than 5.8 (Solved)

TemporaryAccount · 2021-11-21 20:16:43

Long story, many distributions, much frustration.

The constant WiFi problems with my Intel Wireless AC 9260 started after kernel 5.8+ (5.10)
I am getting constant hex-dump looking stuff in console, making the arch installation harder.
Constant jumps from 300mbps to 100mbps to 1mbps.
I'm even having trouble posting this at the 1mbps!

Here is what the hex dumps look like (It's a long list through countless sessions I believe)
The dumps are perfectly timed at the time the wifi speed drops
Output from (sudo journalctl | grep iwlwifi)

https://pastebin.com/U0VjRcat

Here is my /etc/modprobe.d/iwlwifi.conf

options iwlwifi 11n_disable=1
options iwlwifi swcrypto=1
options iwlwifi 11n_disable=8
options iwlwifi bt_coex_active=0

I also forced a 2.5 GHZ Connection.

I don't know what else to put here, any information or logs required for troubleshooting will be provided on request. I have searched countless hours through forums as old as from the 2000s to fix this issue. Any help is appreciated.

Also btw this issue occurs with the LTS kernel as well.

Last edited by TemporaryAccount (2021-11-21 22:17:31)

TemporaryAccount · 2021-11-21 20:17:40

update: these hex dump looking things in console do appear to be hex dumps or logs.

seth · 2021-11-21 21:31:11

Please don't bump, edit your post to mend/extend it unless somebody has replied.

Those are firmware stack dumps - it crashes.
Please don't post filtered journals

11n_disable is set twice … to different values. No idea which one will apply.

There've been a lot of these thread ~1yr ago, see eg. also https://bbs.archlinux.org/viewtopic.php … 5#p1968975 and https://bbs.archlinux.org/viewtopic.php … 0#p1951800 for more parameters reported to be impactful.

Ftr.

I also forced a 2.5 GHZ Connection.

That's either an error or most likely illegal. All legal frequencies operate at 2.4nnn GHz

TemporaryAccount · 2021-11-21 21:53:35

seth wrote:

Please don't bump, edit your post to mend/extend it unless somebody has replied.
Those are firmware stack dumps - it crashes.
Please don't post filtered journals
11n_disable is set twice … to different values. No idea which one will apply.
There've been a lot of these thread ~1yr ago, see eg. also https://bbs.archlinux.org/viewtopic.php … 5#p1968975 and https://bbs.archlinux.org/viewtopic.php … 0#p1951800 for more parameters reported to be impactful.
Ftr.
I also forced a 2.5 GHZ Connection.
That's either an error or most likely illegal. All legal frequencies operate at 2.4nnn GHz

it was a simple guide, im just using the 2.5GHZ connection provided by my router instead of the 5GHZ connection it was by default.

I thought i had to do 11n_disable=8 and 11n_disable=1 as one guide said

also thankyou for the other guides with more parameters for me to apply

Update 15:58, I have applied the parameters from the provided guides and I now have a far more stable connection than I did earlier today. Thanks, I will figure out how to mark this as resolved.

Last edited by TemporaryAccount (2021-11-21 21:59:23)

seth · 2021-11-21 22:13:44

Mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

Arch Linux

#1 2021-11-21 20:16:43

Constant WiFi Performance Dips, All kernels higher than 5.8 (Solved)

#2 2021-11-21 20:17:40

Re: Constant WiFi Performance Dips, All kernels higher than 5.8 (Solved)

#3 2021-11-21 21:31:11

Re: Constant WiFi Performance Dips, All kernels higher than 5.8 (Solved)

#4 2021-11-21 21:53:35

Re: Constant WiFi Performance Dips, All kernels higher than 5.8 (Solved)

#5 2021-11-21 22:13:44

Re: Constant WiFi Performance Dips, All kernels higher than 5.8 (Solved)

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