I have been experiencing this problem through every Ubuntu-distributed
kernel since 10/29/2011, when I purchase the USB3 enclosure listed
below. I am currently experiencing this on Ubuntu 12.10 (server
edition), kernel 3.5.0-23-generic on x86_64 arch.
As with other reports, the problem goes away if I plug the enclosure
into a USB 2 port.
Over the course of the 15+ months I've had to deal with this, I've seen
countless other reports of the same issue on many different sites. I'm
amazed we still have usb3 issues after all this time. I really hope
someone can take ownership of this thing. If I had the knowledge I'd do
it myself...
Disconnects almost every minute.
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kern.log entries:
Jan 28 20:32:52 iron kernel: [23634.082393] usb 9-2: reset SuperSpeed USB
device number 2 using xhci_hcd
Jan 28 20:32:52 iron kernel: [23634.101200] usb 9-2: Parent hub missing LPM
exit latency info. Power management will be impacted.
Jan 28 20:32:52 iron kernel: [23634.102650] xhci_hcd 0000:02:00.0: xHCI
xhci_drop_endpoint called with disabled ep ffff880422682b80
Jan 28 20:32:52 iron kernel: [23634.102657] xhci_hcd 0000:02:00.0: xHCI
xhci_drop_endpoint called with disabled ep ffff880422682bc0
-----
Hardware:
USB3 device: Mediasonic H82-SU3S2 ProBox 8-bay enclosure ("regular", not the
raid version)
USB3 controller: Etron Technology, Inc. EJ168 USB 3.0 Host Controller (rev 01)
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https://bugs.launchpad.net/bugs/1050352
Title:
External USB 3.0 hard drive randomly disconnects and connects
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