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Thank you for your suggestion. But I used several different devices and
all available ports; they all show the same behaviour as described
above. After dualbooting into Windows XP, USB 2 works normal. If I
unbind ehci-hcd, also no problem (but USB 1 speed). Native USB 1 devices
have no problem.
Still an issue with mainline kernel 2.6.35-999-generic #201008021608 SMP
Mon Aug 2 17:26:33 UTC 2010 i686 GNU/Linux.
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Unable to enumerate usb device
https://bugs.launchpad.net/bugs/318085
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Björn, could you try a different usb cable? I had the same issue with an
usb disk, and in the end it turned out to be a bad USB cable.
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Unable to enumerate usb device
https://bugs.launchpad.net/bugs/318085
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Problem is still present with maverick's most recent kernel
2.6.35-8-generic #13-Ubuntu SMP Wed Jul 14 03:01:08 UTC 2010 i686.
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Unable to enumerate usb device
https://bugs.launchpad.net/bugs/318085
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The tip in #4 (echo -n :00:1d.7
/sys/bus/pci/drivers/ehci_hcd/unbind) doesn't work for me (write error:
no such device).
With the latest upstream kernel and linux-image-2.6.35-5-generic from
maverick, USB storage devices again seem to work okay for me. (But I
haven't tested thoroughly
I have to correct myself: I tried the maverick kernel (see above) and a
mainline kernel (Linux schleppi 2.6.35-999-generic #20100653 SMP Fri
Jun 11 12:07:19 UTC 2010 i686 GNU/Linux) and both show the exact same
error like the lucid stock kernel.
Regards,
Björn
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Unable to enumerate usb
Most curious: I found out that the unable to enumerate messages stop
and the device is recognized a lot quicker if I'm on a VT. It takes only
seconds to a few minutes, compared to being in X, where I couldn't yet
get it to work.
It's recognised as full speed (USB 1.1) though. Not optimal.
Hi Toon,
If you could also please test the latest upstream kernel available that
would be great. It will allow additional upstream developers to examine
the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds .
Once you've tested the upstream kernel, please remove the 'needs-
I have some even more bizarre behavior to report with regards to this
bug. The above symptoms only seem to occur when the usb key was plugged
into a Windows XP machine right before trying to mount it in Ubuntu. I
have been able to reproduce this multiple times.
Case 1: attach to a XP box --
I would like to second Bryan Hoyt's comments that this bug is very real
and not the same as other bugs that sound similar (not a device problem,
kernel problem, boot problem, etc.). I have been experiencing the
*exact* same symptoms:
1) Plug in usb key.
2) Key does not automount, but I/O light
I've been getting this (very real unsolved) bug with my Imation Apollo
25 PHDD-160GB (Apollo 2.5 Portable HDD).
uname -a: Linux aldor 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:04:26 UTC
2009 i686 GNU/Linux
distribution: Ubuntu Karmic Koala 9.10 (tho it has affected the last 3
I've been able to confirm this is a USB 2 bug. Executing the following
command to disable the EHCI module enables me to mount the device as a
USB 1 device (but obviously it's not a fix for the bug, because I need
to be able to copy large files onto the device at a reasonable speed):
echo -n
This problem is no longer occuring after a recent kernel upgrade.
--
Unable to enumerate usb device
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** Attachment added: BootDmesg.txt
http://launchpadlibrarian.net/21280162/BootDmesg.txt
** Attachment added: CurrentDmesg.txt
http://launchpadlibrarian.net/21280163/CurrentDmesg.txt
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/21280164/Dependencies.txt
**
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