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morrownr authored Feb 14, 2025
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No. 4

Question: Why do I see high levels of jitter with my mt7922 based wifi card? It uses the mt7921e driver.
Question: Why do I see high levels of jitter with my mt7922 or mt7921 based wifi card (PCIe or M.2)?

Information: Variance in ping times is called "jitter" in networking terminology; it refers to the inconsistency in the arrival time of data packets, essentially measuring how much your ping fluctuates over time.

Information: Both chips use the mt7921e driver.

Answer: You can try disabling power management for that card as follows:

Open a Terminal interface
Open a Terminal interface - Ctrl + Alt + T

Create the file: $ sudo nano /etc/modprobe.d/mt7921.conf

Note: You can use your own favorite text editor in place of `nano` if you wish.

Add the following line to the file: options mt7921e disable_aspm=Y

Save the file and reboot.
Save the file - Ctrl + O, Ctrl + X

Reboot

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No. 5

Question: Why do I see high levels of jitter with my mt7921au based USB WiFi adapter?

Information: Variance in ping times is called "jitter" in networking terminology; it refers to the inconsistency in the arrival time of data packets, essentially measuring how much your ping fluctuates over time.

Information: This chip uses the mt7921u driver.

Answer: If your system uses Network Manager, you can disable power management for the adapter as follows:

Open a Terminal interface - Ctrl + Alt + T

Create the file: $ sudo nano /etc/NetworkManager/conf.d/wifi-powersave.conf

Note: You can use your own favorite text editor in place of `nano` if you wish.

Add the following lines to the file:

```
# Values are 0 (use default), 1 (ignore/don't touch), 2 (disable) or 3 (enable).
wifi.powersave = 2
```

Save the file - Ctrl + O, Ctrl + X

Reboot

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