On Mon, Nov 11, 2019 at 11:31 AM Greg KH <greg@xxxxxxxxx> wrote: > > On Mon, Nov 11, 2019 at 11:11:06AM -0500, Jeffrey Walton wrote: > > Hi Everyone, > > > > I'm having trouble with a C application that opens a USB modem. The > > application is not receiving some data from a USR modem. Conexant > > modems are OK. > > > > I'm working through > > https://www.kernel.org/doc/Documentation/usb/usbmon.txt . I found the > > modem at Bus=01 Dev=24: > > > > T: Bus=01 Lev=03 Prnt=07 Port=00 Cnt=01 Dev#= 24 Spd=480 MxCh= 0 > > D: Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > > P: Vendor=0baf ProdID=0303 Rev= 2.00 > > S: Manufacturer=U.S.Robotics > > S: Product=USB Modem > > > > This is where my confusion lies. It is not clear to me how to > > determine which socket to use for step #3 in usbmon.txt. Step #3 says: > > > > # cat /sys/kernel/debug/usb/usbmon/3u > /tmp/1.mon.out > > > > How do I determine which socket to use for Bus=01 Dev=24? > > From the above documentation, it says to use "3u" for all devices on the > 3rd bus. You want the 1st bus, right? So did you try using "1u"? > > I think wireshark can intrepret usbmon output, so maybe just use that > instead and point it at the USB bus you want to watch? Thanks Greg. I want Bus 1, but I want Device 24 (not all devices). Jef _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
