On Wednesday, May 18, 2011, Dwight Schauer wrote: > On Tue, May 17, 2011 at 8:59 PM, Xu, Andiry <Andiry.Xu@xxxxxxx> wrote: > >> -----Original Message----- > >> From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb- > >> owner@xxxxxxxxxxxxxxx] On Behalf Of Dwight Schauer > >> Sent: Wednesday, May 18, 2011 7:02 AM > >> To: Rafael J. Wysocki > >> Cc: linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx; Sarah Sharp; dschauer@xxxxxx; > >> USB list > >> Subject: Re: [linux-pm] xHCI and suspend/resume > >> > >> On Tue, May 17, 2011 at 5:56 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > >> > On Wednesday, May 18, 2011, Dwight Schauer wrote: > >> >> On Tue, May 17, 2011 at 4:54 PM, Rafael J. Wysocki <rjw@xxxxxxx> > >> wrote: > >> >> > On Tuesday, May 17, 2011, Dwight Schauer wrote: > >> >> >> On Tue, May 17, 2011 at 4:43 PM, Rafael J. Wysocki <rjw@xxxxxxx> > >> wrote: > >> >> > ... > >> >> >> > > >> >> >> > OK, one more test, please. > >> >> >> > > >> >> >> > Try to do > >> >> >> > > >> >> >> > # echo core > /sys/power/pm_test > >> >> >> > # echo mem > /sys/power/state > >> >> >> > > >> >> >> > (that should simulate suspend, but without going into the BIOS, > >> and it > >> >> >> > should return do the command prompt after 5-10 sec.) and check > >> if the > >> >> >> > USB3 controllers work after that ("echo none > > >> /sys/power/pm_test" resets > >> >> >> > to the normal suspend behavior). > >> >> >> > > >> >> >> > Thanks, > >> >> >> > Rafael > >> >> >> > >> >> >> No problem. > >> >> >> > >> >> >> The simulated suspend works fine. > >> >> > > >> >> > Good. > >> >> > > >> >> >> Also, waking up from S3 via a PS/2 keyboard works fine. > >> >> > > >> >> > Hmm. Do you mean that the USB3 controllers work after the resume > >> if > >> >> > the box has been woken up via the keyboard and they don't work > >> when it > >> >> > has been woken up via a power button? > >> >> > > >> >> > Rafael > >> >> > >> >> They work either way. I'm just not able to get the USB keyboard that > >> >> is connected to the USB3 controller to perform the wakeup. (Which is > >> >> what I thought I made clear from the beginning and what Alan Stern > >> had > >> >> reiterated for new readers further into the thread). > >> > > >> > Oh, I must have missed that information. Sorry about that. > >> > > >> > So, the situation is that if you set up the USB3 controllers to wake > >> up > >> > and next you wake up the system from S3 using a USB device connected > >> to one > >> > of those controllers, then they appear to be in D3 after the resume > >> and > >> > apparently cannot be put into D0. However, if the wakeup is done in > >> any > >> > different way, they work correctly after the resume, right? > >> > > >> > Is that the case on both the affected systems? > >> > > >> > >> On both systems the USB3 controllers plugged into PCIe slots work fine > >> after the system has been woken up from S3 suspend state. > >> > >> The USB3 keyboard plugged into the PCIe USB3 controller is immediately > >> avaiable after the system has woken up. It is just that in Linux a > >> keyboard plugged into the USB3 controller can not be used to wake the > >> system up when it has gone into S3 suspend. With Windows 7 on our test > >> systems our USB3 contoller (the Texas Instruments Inc. PCEe xHCI > >> device) a USB keyboard plugged into it can wake it up from an S3 > >> suspend. > >> > > > > I've verified that USB keyboard under xHCI controller can wakeup system > > from S3, either by press the keyboard or plug it in during suspend. But > > you need to enable wakeup in /proc/acpi/wakeup for the corresponding > > xHC controller. > > > > Thanks, > > Andiry > > I was told /proc/acpi/wakeup was deprecated, and to use > /sys/devices/pci.../power/wakeup instead. That is correct, but /proc/acpi/wakeup still contains valid information and is generally useful for debugging, so I'd appraciate it if you could tell me what's in there. > Anyways, the controllers in question are not showing up in > /proc/acpi/wakeup. These are add on cards, not devices included on the > motherboard. In that case you may try to enable wakeup for the bridges they are attached to. Hard to say without any more information. 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
