Denis Carikli (GNUtoo@no-log.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2938
-gerrit
commit 9a5c1ef264567a4bdd7a1ddaeac592cc5a1e19bd Author: Denis 'GNUtoo' Carikli GNUtoo@no-log.org Date: Thu Mar 28 14:24:39 2013 +0100
Lenovo X60: dsdt.asl: Add _OSC method
This commit was modelled after the following commit: 00a0e76bc5ffaba01c98f1c1384b0499516fdaef (AMD Fam14 DSDT: Add OSC method)
Tested under the parabola GNU/Linux distribution: Before that change: $ dmesg | egrep -e OSC -e ASPM [ 0.108036] pci_root PNP0A08:00: ACPI _OSC support notification failed, disabling PCIe ASPM [ 0.108040] pci_root PNP0A08:00: Unable to request _OSC control (_OSC support mask: 0x08) [ 0.118089] ACPI _OSC control for PCIe not granted, disabling ASPM [ 16.874569] e1000e 0000:01:00.0: Disabling ASPM L0s L1 With that change: $ dmesg | egrep -e OSC -e ASPM [ 0.107962] pci_root PNP0A08:00: Requesting ACPI _OSC control (0x1d) [ 0.108003] pci_root PNP0A08:00: ACPI _OSC control (0x1d) granted [ 0.111052] pci 0000:01:00.0: disabling ASPM on pre-1.1 PCIe device. You can enable it with 'pcie_aspm=force' [ 17.537970] e1000e 0000:01:00.0: Disabling ASPM L0s L1
Change-Id: I1caffa44eea447d553c01caaf431f2db241ea5ea Signed-off-by: Denis 'GNUtoo' Carikli GNUtoo@no-log.org --- src/mainboard/lenovo/x60/dsdt.asl | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/src/mainboard/lenovo/x60/dsdt.asl b/src/mainboard/lenovo/x60/dsdt.asl index f32a220..d3a36c0 100644 --- a/src/mainboard/lenovo/x60/dsdt.asl +++ b/src/mainboard/lenovo/x60/dsdt.asl @@ -45,6 +45,16 @@ DefinitionBlock( { #include <northbridge/intel/i945/acpi/i945.asl> #include <southbridge/intel/i82801gx/acpi/ich7.asl> + + /* Operating System Capabilities Method */ + Method(_OSC, 4) + { /* Check for proper PCI/PCIe UUID */ + If(LEqual(Arg0,ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766"))) + { + /* Let OS control everything */ + Return (Arg3) + } + } } }