Yes, please post the acpidump for the machine, we want to look at this _OSC method. Thanks. Bob >-----Original Message----- >From: linux-acpi-owner@xxxxxxxxxxxxxxx [mailto:linux-acpi- >owner@xxxxxxxxxxxxxxx] On Behalf Of Rafael J. Wysocki >Sent: Thursday, October 23, 2008 11:48 PM >To: James Bottomley >Cc: linux-acpi@xxxxxxxxxxxxxxx; linux-kernel; Jesse Barnes; Len Brown; Lin, >Ming M >Subject: Re: Oops in ACPI with git latest > >On Friday, 24 of October 2008, James Bottomley wrote: >> On Thu, 2008-10-23 at 22:42 +0200, Rafael J. Wysocki wrote: >> > On Thursday, 23 of October 2008, James Bottomley wrote: >> > > ACPI Warning (nseval-0168): Insufficient arguments - method [_OSC] >needs 5, found 4 [20080926] >> > > ACPI Warning (nspredef-0252): \_SB_.PCI0._OSC: Parameter count >mismatch - ASL declared 5, expected 4 [20080926] >> > > ACPI Error (nspredef-0163): \_SB_.PCI0._OSC: Missing expected return >value [20080926] >> > > BUG: unable to handle kernel NULL pointer dereference at 00000000 >> > Does this patch help? >> > >> > --- >> > drivers/pci/pci-acpi.c | 3 +++ >> > 1 file changed, 3 insertions(+) >> > >> > Index: linux-2.6/drivers/pci/pci-acpi.c >> > =================================================================== >> > --- linux-2.6.orig/drivers/pci/pci-acpi.c >> > +++ linux-2.6/drivers/pci/pci-acpi.c >> > @@ -83,6 +83,9 @@ static acpi_status acpi_run_osc(acpi_han >> > if (ACPI_FAILURE(status)) >> > return status; >> > >> > + if (!output.pointer) >> > + return AE_NULL_OBJECT; >> > + >> > out_obj = output.pointer; >> > if (out_obj->type != ACPI_TYPE_BUFFER) { >> > printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n"); >> >> Yes, that seems to fix it, thanks! ... I suppose the ASL error and >> warnings need investigating too? > >Unfortunately, they seem to indicate a BIOS breakage. > >According to the spec, _OSC should take 4 arguments, but apparently on your >system it wants 5. > >The output of acpidump may be helpful, as Lin Ming already said. > >Thanks, >Rafael > >-- >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 -- 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
