01_README.md

So a new 802.11ax Mediatek mt7621u USB Wifi device initially didn't work.

It required blacklisting the btusb kernel module to get it to work as a Wifi device.

02_dmesg.log

[17284.667180] usb 4-1.4: new SuperSpeed USB device number 9 using xhci_hcd
[17284.680745] usb 4-1.4: New USB device found, idVendor=0e8d, idProduct=7961, bcdDevice= 1.00
[17284.680754] usb 4-1.4: New USB device strings: Mfr=6, Product=7, SerialNumber=8
[17284.680759] usb 4-1.4: Product: Wireless_Device
[17284.680763] usb 4-1.4: Manufacturer: MediaTek Inc.
[17284.680767] usb 4-1.4: SerialNumber: 000000000
[17284.759357] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20240826151221
[17287.395319] Bluetooth: hci0: Device setup in 2575479 usecs
[17287.395328] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.
[17289.434057] Bluetooth: hci0: Opcode 0x0c03 failed: -110
[17291.482025] Bluetooth: hci0: Failed to read MSFT supported features (-110)
[17293.530032] Bluetooth: hci0: AOSP get vendor capabilities (-110)
[17298.649959] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17304.281908] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17304.489873] usb 4-1.4: device not accepting address 9, error -62
[17309.913835] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17315.545779] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17315.753747] usb 4-1.4: device not accepting address 9, error -62
[17321.177788] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17326.809658] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17327.017618] usb 4-1.4: device not accepting address 9, error -62
[17332.441602] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17338.073540] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17338.281488] usb 4-1.4: device not accepting address 9, error -62
[17338.282221] mt7921u 4-1.4:1.3: probe with driver mt7921u failed with error -5
[17338.282831] usb 4-1.4: USB disconnect, device number 9
[17343.705706] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17349.337392] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17349.545555] usb 4-1.4: device not accepting address 10, error -62
[17354.969334] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17360.601266] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17360.809238] usb 4-1.4: device not accepting address 11, error -62
[17360.809617] usb 4-1-port4: attempt power cycle
[17366.233197] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17371.865147] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17372.073104] usb 4-1.4: device not accepting address 12, error -62
[17377.498072] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17383.129021] xhci_hcd 0000:2a:00.3: Timeout while waiting for setup device command
[17383.336977] usb 4-1.4: device not accepting address 13, error -62
[17383.337346] usb 4-1-port4: unable to enumerate USB device

[17427.605747] usbcore: deregistering interface driver btusb

[17448.985328] usb 4-1.4: new SuperSpeed USB device number 14 using xhci_hcd
[17448.998905] usb 4-1.4: New USB device found, idVendor=0e8d, idProduct=7961, bcdDevice= 1.00
[17448.998912] usb 4-1.4: New USB device strings: Mfr=6, Product=7, SerialNumber=8
[17448.998917] usb 4-1.4: Product: Wireless_Device
[17448.998920] usb 4-1.4: Manufacturer: MediaTek Inc.
[17448.998924] usb 4-1.4: SerialNumber: 000000000
[17449.155921] usb 4-1.4: reset SuperSpeed USB device number 14 using xhci_hcd
[17449.198078] mt7921u 4-1.4:1.3: HW/SW Version: 0x8a108a10, Build Time: 20240826150948a

[17449.227563] usbcore: registered new interface driver btusb

[17449.228260] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20240826151221
[17449.456402] mt7921u 4-1.4:1.3: WM Firmware Version: ____010000, Build Time: 20240826151030
[17451.057170] mt7921u 4-1.4:1.3 wlx00c0cab63cf0: renamed from wlan0
[17451.877976] Bluetooth: hci0: Device setup in 2588446 usecs
[17451.877985] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.
[17451.955161] Bluetooth: hci0: AOSP extensions version v1.00
[17451.955166] Bluetooth: hci0: AOSP quality report is supported
[17492.547585] usb 4-1.4: USB disconnect, device number 14