https://bugzilla.kernel.org/show_bug.cgi?id=89511 --- Comment #7 from Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> --- The information you want is here: T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=04bb ProdID=0109 Rev= 1.00 S: Manufacturer=I-O DATA DEVICE INC. S: Product=I-O DATA HDZ-UES S: SerialNumber=0000000075A7 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 98mA I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=125us The first line says that the device is attached to bus 2. The dmesg log says the same thing: [ 66.872687] usb 2-1: New USB device found, idVendor=04bb, idProduct=0109 [ 66.872692] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 66.872694] usb 2-1: Product: I-O DATA HDZ-UES [ 66.872696] usb 2-1: Manufacturer: I-O DATA DEVICE INC. [ 66.872697] usb 2-1: SerialNumber: 0000000075A7 [ 66.918835] usb-storage 2-1:1.0: USB Mass Storage device detected The "2-1" means the device is attached to bus 2, port 1. Therefore the file you need to cat is /sys/kernel/debug/usb/usbmon/2u and you need to start the cat before the device is plugged in. Use ^C to stop the cat after the error has occurred. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
