On Tue, 20 Nov 2012, Piergiorgio Sartor wrote: > This is the output of usbmod just when the problem happened: > > ffff8801232fd6c0 815566692 C Co:1:012:0 -2 0 > ffff880130cd9000 815566767 S Co:1:012:0 s 23 03 0004 0001 0000 0 > ffff880130cd9000 816577053 C Co:1:012:0 -2 0 ... > ffff880026fb2780 845911126 S Co:1:013:0 s 23 03 0004 0002 0000 0 > ffff880026fb2780 846922109 C Co:1:013:0 -2 0 All this shows is that the computer isn't able to communicate with two of your hubs. > After dmesg reported the error -110 I stopped it. > > Interesting enough, with usbmod running (cat /sys/.../1u > usb1.txt) > the transfer rate, from the HDDs, was around about 10% slower than > usual and the problem did not show up at first. No doubt that was caused by the overhead of using usbmon. > I do not know if it was just by random, but this could hint a race > condition somewhere. > > Any idea? I need to see more of the context. What shows up in the usbmon trace starting somewhat _before_ the problem happens? Also, after the problem occurs, you should go into the /sys/kernel/debug/usb/ehci/ directory and find the subdirectory corresponding to the controller for bus 1. Let's see what the files in that subdirectory say. 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
