Arch Linux

alldogsgotoheaven

Member

Registered: 2025-11-27

Posts: 2

Net jitter issues in online video games with Wi-Fi card MT7921

Hello,

I have encountered an issue that I have not been able to resolve through neither by googling or reading the wiki.
In a game like Counter-Strike 2, my ping is a stable 60 ms, however it tells me that I am getting "net jitter" which goes up to about 130 ms then back down again every 5 seconds or so. I have also tested pinging an IP address (made sure that I wasn't downloading or streaming anything in the background when I ran it) and the results are as such:

ping -c 20 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=112 time=88.5 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=112 time=43.3 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=112 time=30.5 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=112 time=30.2 ms
64 bytes from 8.8.8.8: icmp_seq=5 ttl=112 time=26.9 ms
64 bytes from 8.8.8.8: icmp_seq=6 ttl=112 time=26.4 ms
64 bytes from 8.8.8.8: icmp_seq=7 ttl=112 time=27.6 ms
64 bytes from 8.8.8.8: icmp_seq=8 ttl=112 time=26.7 ms
64 bytes from 8.8.8.8: icmp_seq=9 ttl=112 time=26.2 ms
64 bytes from 8.8.8.8: icmp_seq=10 ttl=112 time=26.6 ms
64 bytes from 8.8.8.8: icmp_seq=11 ttl=112 time=26.1 ms
64 bytes from 8.8.8.8: icmp_seq=12 ttl=112 time=28.9 ms
64 bytes from 8.8.8.8: icmp_seq=13 ttl=112 time=26.5 ms
64 bytes from 8.8.8.8: icmp_seq=14 ttl=112 time=28.1 ms
64 bytes from 8.8.8.8: icmp_seq=15 ttl=112 time=89.8 ms
64 bytes from 8.8.8.8: icmp_seq=16 ttl=112 time=71.6 ms
64 bytes from 8.8.8.8: icmp_seq=17 ttl=112 time=27.9 ms
64 bytes from 8.8.8.8: icmp_seq=18 ttl=112 time=26.7 ms
64 bytes from 8.8.8.8: icmp_seq=19 ttl=112 time=26.3 ms
64 bytes from 8.8.8.8: icmp_seq=20 ttl=112 time=27.0 ms

--- 8.8.8.8 ping statistics ---
20 packets transmitted, 20 received, 0% packet loss, time 19029ms
rtt min/avg/max/mdev = 26.091/36.588/89.824/20.228 ms

I have an internet connection of 120 Mbps download and 20 Mbps upload, my machine previously had Windows on it and I did not have this issue.
When I was looking for ways to fix it I have seen a section related to it on the Arch Wiki, specifically this one: https://wiki.archlinux.org/title/Networ … 1_/_mt7922 and I have ran the commands and made the configurations stated on there, but the problem persists.
I tried to ask chatgpt about it and  it told me about turning off the power-saving mode for the wifi card and had me run this command: sudo iw dev wlan0 set power_save off, which didn't work.
My machine is a Lenovo Ideapad Gaming 3 15ACH6, this arch install is a couple of days old and is up to date.

Thanks in advance regardless of if we may be able to fix this.

AnotherOnit

Member

Registered: 2025-11-07

Posts: 2

Re: Net jitter issues in online video games with Wi-Fi card MT7921

Disable Bluetooth coexistence

sudo iw dev wlan0 set bt_coex 0

Prefer 5 GHz if available

sudo iw dev wlan0 scan | grep SSID  # check available networks
nmcli device wifi connect "YOUR_5GHz_SSID" password "YOUR_PASSWORD"

Update firmware

sudo pacman -Syu linux-firmware

Check driver messages

dmesg | grep mt7922

Test TCP congestion control

sysctl net.ipv4.tcp_congestion_control
sudo sysctl -w net.ipv4.tcp_congestion_control=bbr

run continuous ping to check stability

ping -i 0.2 8.8.8.8

Sorry for my bad english, i'm french

Last edited by AnotherOnit (2025-11-29 12:18:28)