On Mon, 23 Sep 2013, Steve Newcomb wrote: > Lenovo X220. Mains power failure of about 1 second. Machine is powered > by the optional usb-hub-including Lenovo power supply. An external > keyboard was connected to that hub. > > We were asleep. In the morning we found the machine with the disk > access light on steadily, no display on the screen, the fan blowing > hard, and no response to any keypress. We rebooted it normally. > > We've now put the whole setup on a UPS, which should be redundant, given > that the X220 is normally insensitive to transient power failures. But > evidently in combination with the USB hub/power supply, it's not > redundant enough! The issue seems to be power management being applied to the USB3 ports, see if you can disable that in BIOS/EFI. > Sep 22 22:54:05 localhost kernel: [1324507.243029] xhci_hcd 0000:0e:00.0: Timeout while waiting for address device command Here. Whatever it was, it tickled xhci-hcd the wrong way, and it went bonkers. So you'll also need a kernel update since this one is clearly buggy... Also, avoid any power management action that does processor hot(un)plug like the plague, it is *not worth the pain*, and from the logs, the thinkpad might be trying to do just that... -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
