On Sat, Aug 31, 2024 at 12:07:32AM +1000, 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? > > > > What is the diff between running the command before and after removing a > > single device? > > > > thanks, > > > > greg k-h > > BTW, I run a nightly log of system commands which includes lsusb. > The first time the device is listed twice is: > > $ uname -a > Linux e7.eyal.emu.id.au 6.9.11-200.fc40.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jul 25 18:17:34 UTC 2024 x86_64 GNU/Linux Ah, something has changed, that's more interesting. Any way you can use 'git bisect' to see where it changed? > $ lsusb --version > lsusb (usbutils) 017 Did this get upgraded from an older version? Do you see the same thing if you run 'usb-devices' before and after (i.e. 2 devices being added)? How about just a normal 'lsusb'? thanks, greg k-h
