On 17.10.2014 20:59, Matej Kenda wrote: >> I got one icybox from Heinz Diehl some time ago, I wasn't able to reproduce the problem back then, but now >> with a new laptop I can see it randomly disconnecting. >> >> However my issue is a bit different, I see several short packet errors before disconnect, you got >> a context error. >> >> can you add xhci debugging, it should print out the context data of the failing setup context command. >> >> echo -n 'module xhci_hcd =p' > /sys/kernel/debug/dynamic_debug/control >> >> before connecting the icybox > > After enabling debugs I did the following: > > * attached external IcyCox to USB 3 port > it was recognised and mounted automatically on Ubuntu Utopic > * safely removed the disk from Ubuntu desktop > * plugged out the disk > * attached the disk again to the secons USB 3 port > disk was not recognised any more > > Complete kernel log from boot is attached. > > Regards, > > Matej > Thanks, the logs are just what I needed, they give several clues on what could be wrong. I'm in the middle of debugging this, issues that I need to look closer on are: * Device is recongnized as a USB3 SS device the first time, but as a USB2 HS device the second. * the shorter than expected transfers (many of them), finally resetting port and device. * Trying to reset device in already default (after reset) state * failing enabling device (probably trying illegal state transition) -> reset port and device * Tranfer error * ending up in a loop resetting device: - Transfer error on endpoint - Cleaning up stalled endpoint ring - Giveback URB ffff880328a0db40, len = 0, expected = 4096, status = -71 - set port reset, reset device (succesfully) - Setup ERROR: setup context command for slot 3. - disable port, try to reset device (fail, already in default state) - Setup ERROR: setup context command for slot 3. - disable port, try to deset device - Fail to reset device Can't reset device (slot ID 3) in default state - Successful setup address command - Successful Endpoint Configure command - Transfer error on endpoint (back to beginning) Mathias -- 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
