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Bug#622649: linux-image-2.6.38-2-amd64: unable to enumerate USB device on port 6

On Wed, 2011-04-13 at 18:32 +0200, Hans-J. Ullrich wrote:
> I get massive messages from the kernel "unable to enumerate USB device
> on port 6" which is making the pc slower and 
> which is filling up my syslog. The problem is caused by the ohci-hcd
> kernel module. Unloading it, is stopping 
> the messages, but then the mouse will not work (of course).
> This bug appeared the first time at the change from
> linux-image-2.6.32-5-amd64-30 --> linux-image-2.6.32-5-amd64-31 (and
> higher!)
> and it appeared only on 64-bit-systems.

The only change to ohci-hcd between these versions was:

commit 5f528de0ef9b3e092e276d95930830b847b33dc4
Author: Alan Stern <stern@rowland.harvard.edu>
Date:   Fri Sep 10 16:37:05 2010 -0400

    OHCI: work around for nVidia shutdown problem
    commit 3df7169e73fc1d71a39cffeacc969f6840cdf52b upstream.

The reporter's system does indeed have an nVidia MCP67 chipset.  Full
details (kernel log, lspci, etc.) are at <http://bugs.debian.org/620848>
and <http://bugs.debian.org/622649>.


Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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