On Di, 2018-08-14 at 12:17 +0530, Muni Sekhar wrote: > On Mon, Aug 13, 2018 at 7:52 PM, Muni Sekhar <munisekharrms@xxxxxxxxx> wrote: > > On Mon, Aug 13, 2018 at 6:57 PM, Oliver Neukum <oneukum@xxxxxxxx> wrote: > > > On Mo, 2018-08-13 at 18:44 +0530, Muni Sekhar wrote: > > > > [ Please keep me in CC as I'm not subscribed to the list] > > > > > > > > Hello All, > > > > > > > > I’ve a FTDI serial device and it is not recognized if I connect > > > > directly to computer. However if I connect via an external USB hub > > > > it’s fine and I can see the FTDI serial device. What could be the > > > > issue and how to resolve this? > > If I connect the FTDI device directly to computer I don't see any > dmesg log, but after enabling the dynamic debugging for usbcore and > hcd's driver then I see kernel log flooded with the below mentioned > logs. Is it a bug in the hcd's driver? The same device works fine if I > connect via an external USB hub. Hi, you are looking at an issue with the HC driver. Unfortunately you have castrated the logs to an extent that prevents me from telling which HC you are using. However, in any case, you need to find out and contact its driver's maintainer. HTH Oliver
