Re: 2.6.26-rc1 regression since 2.6.25

From: Lukas Hejtmanek
Date: Tue May 20 2008 - 04:40:27 EST

On Mon, May 19, 2008 at 11:47:11AM -0400, Alan Stern wrote:
> > > >
> Can you attach an equivalent dmesg log for 2.6.25 (with
> CONFIG_USB_DEBUG enabled, of course)?


> Let me get this straight. You booted without the dock, and then at
> this line:
> > [14315425.975807] ACPI: \_SB_.GDCK - docking
> you plugged the computer into the dock, right?


> Then apparently here:
> > [14315508.451197] ehci_hcd 0000:00:1a.7: port 4 remote wakeup
> you plugged the USB drive into the dock, but it wasn't detected. Or
> maybe I've got it backward, the drive was already plugged in when you
> docked the computer, and 14315508.451197 is when you unplugged the
> drive. Which was it?

More precisly, it was already plugged but the external power of the USB drive
was switched off and I just switched it on after I had docked.

> Okay, let's see some more debugging information on this. Get a usbmon
> trace (see Documentation/usb/usbmon.txt) for bus 3, starting just
> before you dock the computer. That will tell us exactly what the
> dock's USB hub is reporting.

Moreover, I discovered that removing ehci module before I put the machine into
the dock causes the uhci module to discover the USB device. Dmesg traces are

Do you still need the usbmon traces?

Lukáš Hejtmánek
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