On Sep 28, 2012, at 00:18 , Alan Stern <[email protected]> wrote: > The usbmon trace does not show any errors at all. The file doesn't > contain any occurrences of "-22", for instance.
Ok. How can I tell when this error is visible in the logs? Status field is -22? > > To be most helpful, you should provide both a dmesg log and a usbmon > trace taken at the same time, from a kernel with CONFIG_USB_DEBUG > enabled. First unplug all the USB devices, then do "dmesg -c >> /dev/null", then plug in all the USB devices, then start the usbmon > trace, then run the test. After the failure occurs, collect the trace > and the entire dmesg output and post them. Would it be better to take the usbmon trace from all buses (0u, right?). Or which usbmon socket should I take the traces on? Also, just a document improvement suggestion: the usbmon.txt is a bit vague on the socket types: # ls /sys/kernel/debug/usb/usbmon 0s 0u 1s 1t 1u 2s 2t 2u 3s 3t 3u 4s 4t 4u # This would be a good place to have a short description about what the s, u and t sockets mean. So far I have no clue.. > > Also, it would be good if you could test with the most recent 3.6-rc > kernel. The distribution you use doesn't really matter, only the > kernel version. > Ok, I'll try and do that -Lassi
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