I finally got enough email out of the way to get back to this: On Wed, 2012-12-19 at 16:23 -0800, Sarah Sharp wrote: > On Wed, Dec 19, 2012 at 03:15:09AM +0000, Ben Hutchings wrote: [...] > > I set sysctl kernel.printk=8 and recorded the screen during shutdown, > > from which I transcribe the following: > > > > pcieport 0000:00:1c.6: wake-up capability enabled by ACPI > > xhci_hcd 0000:04:00.0: // Halt the HC > > xhci_hcd 0000:04:00.0: xhci_shutdown completed - status = 1 > > Ok, then the xHCI host controller reported that it did halt > successfully. It should not be sending any interrupts or PMEs when it's > halted. [...] > > So, as far as I can see this problem is specific to: > > - Sleep in S5 > > - Driver loaded > > - Run-time power management disabled > > - No devices or super-speed device plugged in > > > > Any of these avoid the problem: > > - Sleep in S3 or S4 > > - Driver unloaded > > - Run-time power management enabled > > - Low-speed device plugged in > > Is it any low speed device, or just a mouse? Does a connected > keyboard or a USB serial device make the system stay shutdown? A keyboard has the same effect. I don't think I have any USB serial devices to test with. > The symptoms are pretty bizarre, and I honestly don't know what could be > the root cause. I would suggest you try the BIOS update and see if it > fixes the issue. Now that I've worked out how to do the update (Asus's Windows utilities fail to install, but there turns out to be a flash update program inside the setup program) it does seem to be fixed in the current BIOS version (version 4003 dated 2012-08-22). I can't tell for sure whether that's because of a code change or a configuration change, because *of course* the flash update program has to erase the configuration sector too. :-/ Ben. -- Ben Hutchings Never attribute to conspiracy what can adequately be explained by stupidity.
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