On Thursday, October 25, 2012 07:15:58 PM Ulrich Eckhardt wrote: > Am 24.10.2012 23:13, schrieb Bjorn Helgaas: > > On Wed, Oct 24, 2012 at 3:10 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > > >> It can be disabled by writing "on" to the controller's > >> /sys/devices/.../power/control file. > > > > Ulrich, if you boot in the working situation and write "on" to the > > control file as above, can you still reproduce the failure? > > I have done first a cat to the control file which returns already on: > > uli:/ # cat /sys/devices/pci0000\:00/0000\:00\:04.0/power/control > on > > Writing again on to the file does not change anything. Yes, and this means that runtime PM is disabled on the controller. ASPM remains as a possible culprit, then. Can you please boot with pcie_aspm=off in the kernel command line and see if this makes a difference? Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- 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
