On Thursday 31 January 2013 23:32:40 Rafael J. Wysocki wrote: > In general, for ACPI device power management to work, the initial > power states of devices must be known (otherwise, we wouldn't be able > to keep track of power resources, for example). Hence, if it is > impossible to determine the initial ACPI power states of some > devices, they can't be regarded as power-manageable using ACPI. > > For this reason, modify acpi_bus_get_power_flags() to clear the > power_manageable flag if acpi_bus_init_power() fails and add some > extra fallback code to acpi_bus_init_power() to cover broken > BIOSes that provide _PS0/_PS3 without _PSC for some devices. > > Verified to work on my HP nx6325 that has this problem. > > Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Tested-by: Peter Wu <lekenst...@gmail.com> I applied it on top of branch linux-next of repo linux-pm. Fixes the issue I had with bbswitch in Linux 3.8. Can a backport patch be made available for 3.8? Regards, Peter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
