On Wed, Oct 11, 2023 at 11:30:39AM +0200, Greg KH wrote: > On Thu, Oct 05, 2023 at 10:49:10PM -0400, Douglas Gilbert wrote: > > The code in lsusb-t.c seems to assign a special meaning to "-1" devices > > and there is only one of those: "5-1". And the device associated with > > "5-1" is the one that does _not_ appear in the output of 'lsusb -t' but > > does appear in the output of 'lsusb'. > > The code patch of the '-t' option in lsusb is totally separate and apart > from the "normal" portion of lsusb, as you note, it is a separate .c > file as well. -t uses the sysfs representation of the USB devices, > while the other code path uses the 'libusb' representation of the USB > devices. And those seem to differ here (as they do for everyone.) > > So if someone wants to take the time to figure out which representation > is "more correct", that would be great. I don't have the bandwidth to > do so for the next few weeks due to travel requirements on my end, > sorry. Doug, I've looked through the source code in lsusb-t.c (usbutils 015) and I didn't notice any place where it treats device names containing "-1" specially. Can you point it out? Also, if I suggested some debugging additions to the source file, would you be able to build them and test the result? Alan Stern
