On Sun, May 15, 2011 at 12:38:24AM +0200, Rafael J. Wysocki wrote: > On Saturday, May 14, 2011, Dwight Schauer wrote: > > 2011/5/14 Rafael J. Wysocki <rjw@xxxxxxx>: > > > On Saturday, May 14, 2011, Dwight Schauer wrote: > > >> On Fri, May 13, 2011 at 3:37 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > >> > On Friday, May 13, 2011, Dwight Schauer wrote: > > >> >> On Fri, May 13, 2011 at 3:04 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > >> >> > On Friday, May 13, 2011, Dwight Schauer wrote: > > >> >> >> On Thu, May 12, 2011 at 5:29 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > >> >> >> > 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. > > ... > > >> > So, clearly, you don't get any PCIe PME interrupts from root ports > > >> > when the keyboard is plugged in. Without those interrupts the runtime > > >> > resume of xhci won't work. > > >> > > > >> > Please attach the output of "lspci -vv" with "auto" in the (suspended) xhci's > > >> > power/control file before and after you've plugged in the keyboard. > > >> > > > >> > Thanks, > > >> > Rafael > > >> > > >> The lspci -vv before, after, and diff are attached. > > > > > > This means that the PME signaled by the xHCI doesn't cause the PMEStatus bit > > > in its root port to be set, which is why the root port doesn't generate > > > interrupts. This seriously looks like a hardware bug and the only thing > > > we could do to work around it would be to poll the xHCI for the PME status > > > periodically (while suspended). > > > > > > Can you see if the feature works after booting with pcie_ports=compat in > > > the kernel command line? > > > > > > Rafael > > > > > > > I'll try that on Monday (the pcie_ports=compat kernel option). > > > > Well, I've got 2 different systems (one Intel and one AMD based, both > > exhibit the same behavior). > > Are both xHCI controllers from NEC? > > > I have a few other systems I can try it on as well on Monday. > > Please do if possible. If pcie_ports=compat doesn't help, does it help if you use pci=nomsi? I'm wondering if the hardware bug shows up only when MSI or MSI-X is enabled for the NEC hardware. Also, if you turn on CONFIG_USB_XHCI_HCD_DEBUGGING, what NEC firmware version do you see in dmesg? Sarah Sharp _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
