In a USB packet capture in the pcapng format during a firmware update (technically this capture contains the firmware update of two devices, a mouse dongle and the mouse), I got 22 packets that show up as Summary: Unknown type 7f, Group: Malformed and at the top it says "USBPCap did not recognize URB Function code (report to desowin.org/USBPCap).
The way the repeat seems like a pattern, so it may be important:
Group of 4 (as in 4 consecutive packets are of this malformed unknown type 7f) - packet numbers 5737-5740
Group of 4 - packet numbers 12891-12894
Group of 4 - 12980-12983
Group of 2 - 12988-12989
Group of 2 - 12994-12995
Group of 2 - 13052-13053
Group of 4 - 26910-26913
The first packet in each group is always from the Host to the Device.
Total number of packets in the capture 29333.
P.S.
Group 1 is for device 1.9.0 (The dongle)
Group 2 is for device 1.10.0 (The dongle again) (Probably after the update, the device was turned off and on again and switched its id)
Group 3 - 1.11.0 (The mouse) (connected via cable as that's what the updater wanted)
Group 4 - the device is still 1.11.0
Group 5 - the device is still 1.11.0
Group 6 - the device is still 1.11.0
Group 7 - 1.13.0 (The mouse again)
During the capture, only the mouse, its dongle (via its dock) and a keyboard were plugged. The keyboard was not used.
In a USB packet capture in the pcapng format during a firmware update (technically this capture contains the firmware update of two devices, a mouse dongle and the mouse), I got 22 packets that show up as Summary: Unknown type 7f, Group: Malformed and at the top it says "USBPCap did not recognize URB Function code (report to desowin.org/USBPCap). The way the repeat seems like a pattern, so it may be important:
The first packet in each group is always from the Host to the Device.
Total number of packets in the capture 29333.
P.S.
During the capture, only the mouse, its dongle (via its dock) and a keyboard were plugged. The keyboard was not used.
Here are the packets themselves: