Bug 15767

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On Mon, 12 Apr 2010 10:45:33 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=15767
> 
>            Summary: Kernel does not recognize USB devices on some machines
>            Product: Other
>            Version: 2.5
>     Kernel Version: 2.6.32-20
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Modules
>         AssignedTo: other_modules@kernel-bugs.osdl.org
>         ReportedBy: susancragin@earthlink.net
>         Regression: Yes
> 
> 
> Kernels from 2.6.32-20 up to Friday's git do not recognize certain USB
> devices,
> and hence do not load. 
> The problem was brought to attention in the Ubuntu bug tracker system, bug
> 561140.
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561140
> However, I compiled and installed the kernel from git on Friday, 2.6.34, and
> the problem is with the kernel.

Said to be a post-2.6.32 regression.

On Mon, 12 Apr 2010, Andrew Morton wrote:

> > https://bugzilla.kernel.org/show_bug.cgi?id=15767
> > 
> >            Summary: Kernel does not recognize USB devices on some machines
> >            Product: Other
> >            Version: 2.5
> >     Kernel Version: 2.6.32-20

> > Kernels from 2.6.32-20 up to Friday's git do not recognize certain USB
> devices,
> > and hence do not load. 

What makes you think that the kernel doesn't recognize certain USB 
devices?  Which devices doesn't it recognize?  Does unplugging those 
devices make any difference?

Failure to recognize a USB device will not cause the kernel to fail to 
load.  Most likely the problem has a different cause.  You can test 
this by booting with "nousb" on the kernel command line; that will 
prevent the USB stack from running at all.

> > The problem was brought to attention in the Ubuntu bug tracker system, bug
> > 561140.
> > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561140
> > However, I compiled and installed the kernel from git on Friday, 2.6.34,
> and
> > the problem is with the kernel.

Does that kernel contain the fix listed in the Ubuntu bug report?  Have 
you tried booting with "acpi=off" on the command line, as recommended 
in the bug report?

You need to provide much more information; otherwise nobody will have a
clue as to where to look for the problem.  For example, apart from all
the questions above, what shows up on the screen when the computer
hangs?

Alan Stern

On Mon, 12 Apr 2010, Andrew Morton wrote:

> > https://bugzilla.kernel.org/show_bug.cgi?id=15767
> > 
> >            Summary: Kernel does not recognize USB devices on some machines

> > Kernels from 2.6.32-20 up to Friday's git do not recognize certain USB
> devices,
> > and hence do not load. 
> > The problem was brought to attention in the Ubuntu bug tracker system, bug
> > 561140.
> > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561140
> > However, I compiled and installed the kernel from git on Friday, 2.6.34,
> and
> > the problem is with the kernel.
> 
> Said to be a post-2.6.32 regression.

Andrew:

The ubuntu bug report now says that the issue has been resolved and
it's really another duplicate of Bugzilla #15749.  Do you want to mark 
this entry as a duplicate and close it out?

Alan Stern

*** This bug has been marked as a duplicate of bug 15749 ***

On Mon, 24 May 2010 17:33:01 -0400 (EDT)
Alan Stern <stern@rowland.harvard.edu> wrote:

> On Mon, 12 Apr 2010, Andrew Morton wrote:
> 
> > > https://bugzilla.kernel.org/show_bug.cgi?id=15767
> > > 
> > >            Summary: Kernel does not recognize USB devices on some
> machines
> 
> > > Kernels from 2.6.32-20 up to Friday's git do not recognize certain USB
> devices,
> > > and hence do not load. 
> > > The problem was brought to attention in the Ubuntu bug tracker system,
> bug
> > > 561140.
> > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561140
> > > However, I compiled and installed the kernel from git on Friday, 2.6.34,
> and
> > > the problem is with the kernel.
> > 
> > Said to be a post-2.6.32 regression.
> 
> Andrew:
> 
> The ubuntu bug report now says that the issue has been resolved and
> it's really another duplicate of Bugzilla #15749.  Do you want to mark 
> this entry as a duplicate and close it out?
> 

Done, thanks.