[ltp] Re: T60 Advanced Mini Dock usb problem

[U Kuehn]

Stefan Monnier wrote:
>>>> I have a T60 and the Advanced Mini Dock (39T4596).  I have found that the
>>>> usb ports on the back on the dock only work if the laptop is powered up
>>>> while in the dock.  If I dock the machine already booted up, the
>>>> ports/hub isn't registered and naturally don't work.
>>> Hmm... I have this exact same thing, but I only used the ethernet&DVI ouput
>>> until now.  I'll try it when I get back to my office.
>>>
>>> Does it work if you hibernate&wakeup (aka suspend-to-disk)?
> 
> I've just tried it on my machine, and I see the problem you describe
> as well.  But as soon as I suspend&wake up, it all goes back to normal.
> Even suspending to ram is sufficient.
> 
> I hadn't noticed it before, because I barely if ever dock my machine while
> it's running.  It's always either sleeping (suspended to ram) or turned off
> (usually suspended to disk).
> 

Maybe unloading and reloading the usb driver modules (uhci_hcd,
ehci_hcd) after putting the machine into the dock helps? I know this
would only be a cheap workaround, but might help tracking down the problem.

Regards,
Ulrich