[Bug 2161448] Re: mt7921u: USB Wi-Fi enters unrecoverable state after prolonged uptime; NetworkManager/supplicant stalls followed by USB disconnect deadlock

Thank you for the detailed report. Could you please provide the following? - From a boot where the problem occurred, open a terminal and copy and paste the command below. It will save the complete kernel log as dmesg.txt in your home folder. After the command finishes, attach that file to this bug: sudo dmesg > ~/dmesg.txt - While running an affected Ubuntu kernel, open a terminal and copy and paste the command below. It will add the diagnostic information directly to this report: apport-collect 2161448 - Please tell me the exact Ubuntu kernel version where the problem occurs. Open a terminal, copy and paste this command, and include its output: uname -r These details will help identify the affected kernel path and the next useful test. If any step does not work as expected, please tell me what happened and I will help you with the next steps. ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Krystian Kaniewski (kkaniewski) -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2161448 Title: mt7921u: USB Wi-Fi enters unrecoverable state after prolonged uptime; NetworkManager/supplicant stalls followed by USB disconnect deadlock Status in linux package in Ubuntu: Incomplete Bug description: Netgear A8000 (MediaTek mt7921u/mt7922 USB) intermittently loses connectivity after many hours or overnight. The interface remains associated with the AP and retains a DHCP address, but no traffic passes. Symptoms: nmcli shows connected or attempts reconnection. Ping to the default gateway returns "Destination Host Unreachable". Kernel repeatedly logs: unregister_netdevice: waiting for wlx... to become free. Usage count = 2 Previous debugging showed tee blocked inside mt792xu_disconnect() during usb_unbind_interface(). Restarting sudo systemctl restart wpa_supplicant NetworkManager immediately restores connectivity without unplugging the adapter or rebooting. Additional observations USB runtime power management disabled (power/control=on) rfkill not blocked interface still exists during failure Wi-Fi PHY still present NetworkManager restart does not recover the severe failure USB unbind hangs Driver unload therefore cannot complete NOTE: I also have a 394 MB apport report. Would it be useful, or are the attached failure-time logs sufficient? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161448/+subscriptions