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?
>
>
> Also one more behaviour, when I ran “lsusb” it hangs forever and ‘ps’
> command output shows the state as “Dl+”. Any reasons for this
> behaviour?
Impossible to tell. Switch on dynamic debugging for usbcore and your
hcd's driver and post dmesg.
Sysrq-T during the hang would also help.
Regards
Oliver
