[BUG] mt7921e: Intermittent connection failure

[Sean Wang]

Hi,

Thanks for the update and for sharing the revised script and rerun logs.
I tried to reproduce the issue with your script on an mt7921u, but I
could not reproduce the timeout on my side.
In my run, I got 398 reload cycles and 398 successful reconnects:
grep Reloading test_log.txt | wc -l
388
grep Connection test_log.txt | wc -l
398
The log is consistently like this after module reload [1]
If this were a generic race in the common MCU command layer, I would
expect it to reproduce on mt7921u as well.
Also, could you record and save the "iw event" log when you run the
test? That would help show what userspace-triggered
activities are happening. we can mimic the same sequence using wpa_cli

[1]
Starting WiFi mt7921u reset loop (using NetworkManager)
Making sure network services are down...
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Status: Connecting
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Status: Connecting
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
Reloading module mt7921u...
Starting network services...
Checking for connection...
Checking for connection...
Connected.
Connection succeeded. Cleaning up.
----------------------------------------
...
and so on

On Tue, Apr 14, 2026 at 1:22 AM silverducks <silverducks at altlinux.org> wrote:
>
> Greetings!
>
> Update:
> New version of the script is less consistent at reproducing the bug.
> I've also noticed that on patched kernel it triggers timeout way
> more often than older script. I've rolled back to the older one,
> which relies on the NM autoconnect feature, though retained cleanup
> changes.
> I'm guessing direct nmcli command is often preventing NM from doing
> whatever it is usually doing that triggers the error.
> Script and reruns with it attached.