On Sun, 3 Jun 2007, Rafael J. Wysocki wrote: > Hi, > > One of my test boxes suspends to RAM just fine except that if ehci_hcd is > loaded before the suspend, the box resumes immediately after going to sleep. Evidently the hardware thinks a wakeup event has occurred. It is possible to disable remote wakeup via sysfs, but it would be more interesting to find out the real reason for the wakeup. I don't know how to go about doing that, however. It might be some interaction at the ACPI level, and it might involve the PCI PME# signal. Do you have any USB devices attached when you suspend? You can try using the patch below to see what happens when you manually suspend the controller. It enables PCI devices to respond to the legacy power/state attribute. You should look at what "lspci -vv" says about the controller's power management signals, both before and after suspending the PCI device entry. Maybe also see what ACPI reports. Alan Stern Index: usb-2.6/drivers/base/power/sysfs.c =================================================================== --- usb-2.6.orig/drivers/base/power/sysfs.c +++ usb-2.6/drivers/base/power/sysfs.c @@ -45,10 +45,6 @@ static ssize_t state_store(struct device pm_message_t state; int error = -EINVAL; - /* disallow incomplete suspend sequences */ - if (dev->bus && (dev->bus->suspend_late || dev->bus->resume_early)) - return error; - state.event = PM_EVENT_SUSPEND; /* Older apps expected to write "3" here - confused with PCI D3 */ if ((n == 1) && !strcmp(buf, "3")) _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
