Public bug reported:
I have both a Western Digital MyPassport Essential 500GB harddisk and a
Seagate FreeAgent GoFlex Desk 2TB working ok on my ASUS U3S6 XHCI
controller in USB 3.0 mode. Currently I'm using ubuntu 10.04 (Lucid).
When I disconnect the devices, and connect a USB 3.0 hub (DeLock USB 3.0
External HUB 4 Port), the HUB is detected by linux, but no USB 3.0
devices (i.e. the mentioned HDDs) connected to said HUB. USB 2.0 devices
connected to the HUB are detected and working properly, though. When
connecting the hub, 2109:0810 and 2109:3431 appear in "lsusb".
I've got the HUB working in 3.0 mode by means of compiling a kernel from
git: dbe79bbe9dcb22cb3651c46f18943477141ca452 (USB 3.0 Hub Changes). I'm
not 100% sure if this is the exact commit enabling USB 3.0 HUB
operation, but there is strong evidence for it. If this is "the fix",
the next ubuntu release (11.10) will likely support USB 3.0 HUBs "out of
the box".
In addition to 10.04, I also tried the HUB on 11.04 (natty), observing
the same problem. For now I'll omit the "default" system information,
because I believe the problem is not related to my particular hardware
setup. If you request, I'm happy to submit this information too.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/783097
Title:
USB 3.0 devices not working behind USB 3.0 HUBs
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