On Tue, 29 Jun 2010, Manjunath Doddavenkatappa wrote: > Please find the attached recent dmesg output. I am new to Linux kernel, > did you mean any other log files ??? > > More Details: > > To be more detailed, we are using a mini PC running the kernel > 2.6.22-14-generic. The PC is attached to four 7-port Belkin's USB hubs > which in turn accommodates 28 (4*7) sensor devices. The sensor devices are > attached using active cables. Each active cable acts as a single port hub > and mesaures 5m in length. As USB limits number of hubs that can be > connected in series (daisy chain) to five, maximum of 5 active cables can > be connected in series to cover a length of 25 meters. USB connections are > fine most of the time, problem occurs once/twice daily. As far as I can see, the log file shows one instance of a spontaneous disconnection (at timestamp 26100098.536000). It fixed itself about nine seconds later, with no need for anybody to remove or reload ehci-hcd. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
