I have two machines where the Intel xHCI devices don't wake up from runtime suspend after a S3 suspend/resume on Xen 4.0.3 and Linux 3.2.9. The first is a Ivybridge laptop and after resuming on battery, inserting a usb device into a port no longer wakes up the xHCI device. Changing the power mode from "auto" to "on" fixes it. It is not broken on Ubuntu 12.04 Beta 1 with Linux 3.2.0. I have also have a Intel SDP desktop where setting the power mode to "auto" on the xHCI device does not break device insertion enabling the device on a fresh boot, but does break it after a S3 resume. I have an instrumented kernel and see no rpm_resume for this device int he bad case. Wake up works fine for devices plugged into EHCI. I've also posted this to xen-devel earlier: http://lists.xen.org/archives/html/xen-devel/2012-03/msg00727.html -- 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
