On Thu, 2011-12-08 at 13:01 +0800, Bjorn Helgaas wrote: > [+cc linux-acpi and Lin Ming] > > On Wed, Dec 7, 2011 at 3:38 PM, <wallak@xxxxxxx> wrote: > > We have a regression on the ACPI stack of the last linux kernel line 3.x (3.1.4, > > 3.2-rc4...). The ACPI "_PDC" chunk is not executed on some computers (e.g. Dell > > X300; the function acpi_processor_set_pdc() is not called). This issue yield to > > an uninitialized state of some ACPI variables. > > > > A patch is available below. This patch come back to the previous linux behavior, > > and works fine. Hi, Wallak Please attach the acpidump output and kernel .config file. And also the output of "cat /proc/cpuinfo" (You can send these files to me offline in case they are too big for mail list) Thanks, Lin Ming > > > > Best Regards, > > Wallak. > > > > --- linux-3.1.4-mdf/drivers/acpi/processor_core.c.orig 2011-12-07 > > 23:12:57.000000000 +0100 > > +++ linux-3.1.4-mdf/drivers/acpi/processor_core.c 2011-12-07 > > 23:13:39.000000000 +0100 > > @@ -223,8 +223,8 @@ > > type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0; > > cpuid = acpi_get_cpuid(handle, type, acpi_id); > > > > - if (cpuid == -1) > > - return false; > > + if ((cpuid == -1) && (num_possible_cpus() > 1)) > > + return false; > > > > return true; > > } > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
