On Wed, 9 Jan 2008, Carlos Corbacho wrote: > I've had confirmation from another nForce 4 box that Vista also disables > autosuspend/ selective suspend on the root hubs there, so I'm pretty > confident in saying now that this will also be needed in Linux (definitely > for OHCI. I don't think we need to stop autosuspend on EHCI, even though > Windows does appear to disable it for that as well), to avoid inadvertently > triggering the suspend-to-RAM hang on these broken BIOSs. > > (Testing also shows that putting the OHCI controller into D2 is no good > either - having it in any state other than D1 before we call the ACPI _PTS() > method will reliably hang the box on suspend). > > What's the best way to go about doing this? I've been glancing over the OHCI > code and I can't see how to easily do this (unless 'broken_suspend' is the > correct option here?) Currently there's no need to change anything. The USB autosuspend code affects only the controller's USB interface -- it doesn't touch the PCI side. An autosuspended controller will remain in D0. Until somebody tries writing autosuspend code for PCI devices... Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
