James Cloos wrote in comment 34:
> Switching to the performance govenor, removing the drive and re-adding it
> worked around the bug.
>
> Something must be blocking power to the xhci when the cpu is saving power...?
I believe that USB autosuspend is the culprit here. I'm seeing this
problem on Fedora Linux as well, so I suspect it's an upstream bug.
For those of you who are having this problem: please try disabling USB
autosuspend on all USB devices, by running the following command as
root:
$ for F in /sys/bus/usb/devices/*/power/control; do echo on >"${F}";
done
You can then verify that the power control status for all devices is
"on", not "auto". E.g.:
$ grep . /sys/bus/usb/devices/*/power/control
/sys/bus/usb/devices/1-1/power/control:on
/sys/bus/usb/devices/1-2/power/control:on
/sys/bus/usb/devices/7-1/power/control:on
/sys/bus/usb/devices/7-2/power/control:on
/sys/bus/usb/devices/usb1/power/control:on
/sys/bus/usb/devices/usb2/power/control:on
/sys/bus/usb/devices/usb3/power/control:on
/sys/bus/usb/devices/usb4/power/control:on
/sys/bus/usb/devices/usb5/power/control:on
/sys/bus/usb/devices/usb6/power/control:on
/sys/bus/usb/devices/usb7/power/control:on
/sys/bus/usb/devices/usb8/power/control:on
If you do this, do your USB3 ports work properly?
(For me, on Fedora Linux, disabling USB autosuspend made all my USB
ports work perfectly.)
Note: if you've already caused the xhci_hcd driver to die, you'll need
to reboot first.
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https://bugs.launchpad.net/bugs/1242321
Title:
USB 3.0 Harddrive not recognised
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