On Thursday, May 12, 2011, Rafael J. Wysocki wrote: > On Thursday, May 12, 2011, Alan Stern wrote: > > For new readers: The problem is that an xHCI USB host controller does > > not wake up a suspended system properly. > > > > On Thu, 12 May 2011, Dwight Schauer wrote: > > > > > Thanks Alan. > > > > > > OK, this is with 2.6.39-rc7-gregkh > > > > > > 05:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host > > > Controller (rev 03) (prog-if 30 [XHCI]) > > > Subsystem: Melco Inc Device 0241 > > > Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- > > > ParErr- Stepping- SERR+ FastB2B- DisINTx+ > > > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- > > > <TAbort- <MAbort- >SERR- <PERR- INTx- > > > Interrupt: pin A routed to IRQ 17 > > > Region 0: Memory at fe9fe000 (64-bit, non-prefetchable) [size=8K] > > > Capabilities: [50] Power Management version 3 > > > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA > > > PME(D0+,D1-,D2-,D3hot+,D3cold-) > > > Status: D3 NoSoftRst+ PME-Enable+ DSel=0 DScale=0 PME+ > > > > That's the important part for power management and wakeup. The > > controller does support PCI wakeup. In fact, at the time you ran lspci > > the controller _was_ suspended and it was signalling a wakeup request! > > Obviously something is wrong somewhere... > > > > > @@@ With "on" in power/control I get this upon plugging in a keyboard: > > ... > > > @@@ and upon removing it: > > > > All normal. > > > > > @@@ If I put "auto" in power/control I get this: > > > > > > xhci_hcd 0000:05:00.0: hcd_pci_runtime_suspend: 0 > > > xhci_hcd 0000:05:00.0: PME# enabled > > > > This means the controller was suspended with wakeup enabled, as it > > should be. > > > > > @@@ Upon plugging in a keyboard nothing. > > > > Indeed, that is a problem. Since wakeup doesn't work right at runtime, > > it's not surprising that it also fails during system sleep. > > > > > @@@ Setting power/wakeup to "enabled" (it was "disabled") has no > > > effect on this behaviour. > > > > The power/wakeup attribute affects only the wakeup setting for system > > sleep; it doesn't affect wakeups for runtime PM. > > > > Clearly something is wrong. But it looks like the problem might be > > somewhere else, not in the xHCI driver. Is your BIOS up to date? > > > > CC-ing the linux-pm mailing list in case anybody there has some ideas. > > I need a boot log from 2.6.39-rc6 (or current Linus') on the affected system. That should have been -rc7, sorry. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
