Question

4

Slow WiFi connection Ubuntu 18.04 with onboard Intel Wi-Fi 6 AX200

rated 0 times [ 4] [ 0] / answers: 1 / hits: 6011 / 2 Years ago, fri, april 15, 2022, 4:54:00

I installed Ubuntu 18.04 and I noticed getting packages and loading websites is very slow. Other WiFi devices on the same network are unaffected. I've iterated through a variety of fixes such as overriding DNS configuration to use Google/Cloudflare hosts, disabling IPv6, and some other obscure suggestions that I've since reverted.

It's a desktop build with onboard intel WiFi on an Asrock Taichi x570 motherboard.

I've noticed a suspicious line at the end of dmesg:

[  218.374518] TCP: wlp6s0: Driver has suspect GRO implementation, TCP performance may be compromised.

Output of lshw -C network

  *-network                

       description: Ethernet interface

       product: Wi-Fi 6 AX200

       vendor: Intel Corporation

       physical id: 0

       bus info: pci@0000:06:00.0

       logical name: wlp6s0

       version: 1a

       serial: dc:fb:48:00:24:63

       width: 64 bits

       clock: 33MHz

       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical

       configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-14-generic firmware=48.4fa0041f.0 cc-a0-48.ucode ip=192.168.86.98 latency=0 link=yes multicast=yes

       resources: irq:24 memory:f7500000-f7503fff

Any help would be appreciated. LMK what other info I can provide.

EDIT 1: Since this is a fairly new chipset it's been mentioned that it may not be supported yet. This page mentions

The new 802.11ax WiFi 6 protocol introduced in 2019 is the fastest
WiFi protocol available.

Unfortunately, there are no 802.11ax WiFi 6 Linux adapters yet.

https://www.wirelesshack.org/top-linux-compatible-usb-wireless-adapters.html

Though I did find some devices that support this chipset in Ubuntu's hardware certification list, but not my motherboard (I'm not sure if they "certify" onboard motherboard components).

https://certification.ubuntu.com/catalog/component/8086:2723

EDIT 2: Could it be related to power saving mode on the adapter? I've tried deactivating this, but have been unsuccessful.

$ sudo iwconfig wlp6s0 power off

Error for wireless request "Set Power Management" (8B2C) :

    SET failed on device wlp6s0 ; Operation not supported.

https://bbs.archlinux.org/viewtopic.php?pid=1690406#p1690406

EDIT 3: Pastebin for dmesg | grep -e wlp -e iwl: https://pastebin.com/zSUbBX3p

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

elecerna

Add To Favorites

Follow

Total Points: 140

Total Questions: 121

Total Answers: 107

Location: Northern Ireland

Member since Sun, Nov 21, 2021

3 Years ago

answered 2 Years ago pardsea · Accepted Answer

I see nothing alarming in your paste; that is, anything that would obviously hinder speeds.

Does your router have 802.11ax capabilities? If not, let's disable it in the iwlwifi driver as an experiment:

sudo -i

echo "options iwlwifi disable_11ax=Y"  >>  /etc/modprobe.d/iwlwifi.conf

exit

Next, please turn your attention to the router. WPA2-AES is preferred; not any WPA and WPA2 mixed mode and certainly not TKIP. Second, if your router is capable of N speeds, you may have better connectivity with a channel width of 20 MHz in the 2.4 GHz band instead of automatic 20/40 MHz, although it is likely to affect N speeds. I recommend a fixed channel, either 1, 6 or 11, rather than automatic channel selection. Also, be certain the router is not set to use N speeds only; auto B, G and N is preferred. After making these changes, reboot the router.

Next, I recommend that your regulatory domain be set explicitly. Check yours:

sudo iw reg get

If you get 00, that is a one-size-maybe-fits-all setting. Find yours here: http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 Then set it temporarily:

sudo iw reg set IS

Of course, substitute your country code if not Iceland. Set it permanently:

sudo nano /etc/default/crda

Change the last line to read:

REGDOMAIN=IS

Proofread carefully, save and close the text editor.

Reboot and let us hear the results.