Messages in this thread | | | Date | Tue, 25 Dec 2012 12:06:38 -0600 | From | Larry Finger <> | Subject | Re: Regression in kernel 3.8-rc1 bisected to commit adfa79d: I now get many "unable to enumerate USB device" messages |
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On 12/25/2012 10:26 AM, Alan Stern wrote: > On Mon, 24 Dec 2012, Larry Finger wrote: > >> The problem has been bisected to commit adfa79d entitled "USB: EHCI: make >> ehci-pci a separate driver". The symptom is that my NVIDIA controller again >> reverts to unended logging of messages of the form "hub 2-0:1.0: unable to >> enumerate USB device on port 5". > > A few more details would be helpful, such as the dmesg log (with > CONFIG_USB_DEBUG enabled). As it is, I don't see how that commit could > cause this problem. It should not have resulted in any changes in > behavior -- all it did was split up a driver that was one module into > two modules. > >> This behavior was previously fixed with commit c618759. > > That commit affected the ohci-hcd driver, whereas this one affects > ehci-hcd. They can't possibly be related.
Alan,
You are the expert, but I am confident of my bisection. A kernel built from commit 3e02320 does not have the problem, but commit adfa79d does.
The dmesg output with CONFIG_USB_DEBUG enabled is posted at http://susepaste.org/790689.
Thanks for looking at this.
Larry
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