On Mar 15, 2012, at 10:35 AM, Tom Goetz wrote: > > On Mar 14, 2012, at 1:46 PM, Tom Goetz wrote: > >> >> On Mar 14, 2012, at 12:57 PM, Sarah Sharp wrote: >> >>> On Wed, Mar 14, 2012 at 09:52:28AM -0400, Tom Goetz wrote: >>>> >>>>> >>>>> Why were you posting there in particular? You're much more likely to >>>>> get your USB questions answered on this mailing list. :) >>>> >>>> I'm concerned that this may be a bug in the Xen PVOPs MSI code. To that end I've posted updates on xen-devel here: >>>> >>>> http://lists.xen.org/archives/html/xen-devel/2012-03/msg00904.html >>>> http://lists.xen.org/archives/html/xen-devel/2012-03/msg00727.html >>>> http://lists.xen.org/archives/html/xen-devel/2012-03/msg00978.html >>> >>> Does the xHCI host work fine without Xen? I.e. running Linux directly >>> as the host OS, suspending, resuming, and then plugging in a device? >> >> It works in Ubuntu 12.04 Beta 1 with Linux 3.2.0. So it's either broken between 3.2.0 and 3.2.5 or it's broken in Xen. I haven't made a direct comparison yet. I'm putting Ubuntu on my SDP now to test that. > > xHCI wakes up from D3 on the SDP with Ubuntu 12.04 Beta 1 and 3.2.11. This fails with the same 3.2.11 kernel and Xen. So the problem is Xen related. Another update. On the Ivybridge laptop, xHCI is not waking up because when I plug a device into a xHCI port the ACPI wakeup events are going to the e1000e. Pre S3, it eventually gets a interrupt from the device that wakes it up. Post S3 it never gets an interrupt from the device. On the SDP, I get ACPI wake up calls for the xHCI before S3, but not after. Both cases work with out Xen. I'm assuming Xen/PVOPs is leaving the device in a state the causes the ACPI wake up events to be masked. Can you tell me what what state that could be? I can look at decompiling the ASL to find out, but that's not my first choice. Toggling the power policy (auto->on->auto) does not fix delivery of ACPI wake up events for this device. I am still getting ACPI wake ups for the e1000e, so it's not all wake ups that are blocked. Thanks for any help. -Tom-- 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
