On Fri, 16 Sep 2005, Greg KH wrote:
> On Fri, Sep 16, 2005 at 05:00:49PM +0100, Alan Cox wrote:
> > On Gwe, 2005-09-16 at 10:25 -0500, Dmitry Torokhov wrote:
> > > Interdependencies between ACPI, PNP, USB Legacy emulation and I8042 is
> > > very delicate and quite often changes in ACPI/PNP break that balance.
> > > USB legacy emulation is just evil. We need to have "usb-handoff" thing
> > > enabled by default, it fixes alot of problems.
> >
> > I would definitely agree with this. There are very few, if any, cases
> > usb handoff doesn't work now that the Nvidia problems are fixed.
>
> Are we sure? Yeah, SuSE has shipped that code "enabled" for a while,
> but I'm still not comfortable making that the default.
>
> Only if we merge the code that does the handoff, with the same code that
> does it in the usb core, would I feel more comfortable to enable this
> always. I had a patch from David Brownell to do this, but it had some
> link errors at times, so I had to drop it :(
Merging the code would be a good thing. As it stands right now, bad
interactions between the PCI handoff code and uhci-hcd will prevent UHCI
controllers from retaining state across a suspend-to-disk.
Alan Stern
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