On Fri, Aug 30, 2024 at 11:43:39PM +1000, Eyal Lebedinsky wrote: > On 30/8/24 11:41 pm, Eyal Lebedinsky wrote: > > On 30/8/24 10:32 pm, Greg KH wrote: > > > On Fri, Aug 30, 2024 at 10:14:20PM +1000, Eyal Lebedinsky wrote: > > > > I assume that the generated list is a tree, so each leaf (Device/If) is on only one point. > > > > > > > > I note this output: > > > > > > > > $ lsusb -tv > > > > /: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/16p, 480M > > > > ID 1d6b:0002 Linux Foundation 2.0 root hub > > > > [trimmed] > > > > |__ Port 004: Dev 004, If 0, Class=Hub, Driver=hub/4p, 480M > > > > [trimmed] > > > > |__ Port 005: Dev 006, If 0, Class=Hub, Driver=hub/4p, 480M > > > > [trimmed] > > > > |__ Port 006: Dev 019, If 0, Class=Hub, Driver=hub/4p, 480M > > > > ID 2109:2817 VIA Labs, Inc. > > > > /: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 10000M > > > > [trimmed] > > > > |__ Port 006: Dev 006, If 0, Class=Hub, Driver=hub/4p, 5000M > > > > ID 2109:0817 VIA Labs, Inc. > > > > > > > > I removed some content that is not relevant to my question. > > > > > > > > Note the Bus 001.Port 006 and Bus 002.Port 006 entries. > > > > > > > > I verified that both are for the same (one) device. They do not show when I disconnect it. > > > > The device is an external 4-port USB3.0 hub. It is listed once as 480M and once as 5000M. > > > > Nothing is plugged into any of the four ports. > > > > > > > > Is this correct? Why does this device show twice in the list? > > > > > > That's odd, as the same device shouldn't be on multiple busses. Busses > > > are a "root port" on the system (i.e. a new PCI controller device), so > > > are you sure you just don't have multiple devices with the same > > > device/vendor id? > > > > The hub is on an extension cable, and I just unplug it the hub. > > > > > What is the diff between running the command before and after removing a > > > single device? > > > > $ lsusb -tv >lsusb-all.log > > $ lsusb -tv >lsusb-less.log > > $ diff -u lsusb-all.log lsusb-less.log > > --- lsusb-all.log 2024-08-30 23:39:09.782062079 +1000 > > +++ lsusb-less.log 2024-08-30 23:39:22.608987407 +1000 > > @@ -48,8 +48,6 @@ > > ID 0c45:7401 Microdia TEMPer Temperature Sensor > > |__ Port 004: Dev 018, If 1, Class=Human Interface Device, Driver=[none], 1.5M > > ID 0c45:7401 Microdia TEMPer Temperature Sensor > > - |__ Port 006: Dev 019, If 0, Class=Hub, Driver=hub/4p, 480M > > - ID 2109:2817 VIA Labs, Inc. > > /: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 10000M > > ID 1d6b:0003 Linux Foundation 3.0 root hub > > |__ Port 004: Dev 002, If 0, Class=Hub, Driver=hub/4p, 5000M > > @@ -58,5 +56,3 @@ > > ID 0bda:0411 Realtek Semiconductor Corp. Hub > > |__ Port 005: Dev 003, If 0, Class=Hub, Driver=hub/4p, 5000M > > ID 05e3:0612 Genesys Logic, Inc. Hub > > - |__ Port 006: Dev 006, If 0, Class=Hub, Driver=hub/4p, 5000M > > - ID 2109:0817 VIA Labs, Inc. > > Also, here these the log messages when I reconnect the hub: > > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 1-6: Product: USB2.0 Hub > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 1-6: Manufacturer: VIA Labs, Inc. > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: hub 1-6:1.0: USB hub found > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: hub 1-6:1.0: 4 ports detected > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 2-6: new SuperSpeed USB device number 7 using xhci_hcd > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 2-6: New USB device found, idVendor=2109, idProduct=0817, bcdDevice= 0.50 > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 2-6: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 2-6: Product: USB3.0 Hub > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: usb 2-6: Manufacturer: VIA Labs, Inc. > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: hub 2-6:1.0: USB hub found > 2024-08-30T23:41:52+10:00 e7.eyal.emu.id.au kernel: hub 2-6:1.0: 4 ports detected Extension cables are very wierd, and you are right, this is two different hubs on two ports. Is this a thunderbolt device somehow? Anyway, as long as everything is working properly, all should be good. What happens when you plug a device into this cable at the other end, does it show up twice? Or just once? thanks, greg k-h
