the following patch was just integrated into master: commit 4b213a8d1fd02061c1e879ff98167bcb47f13bd2 Author: Denis 'GNUtoo' Carikli GNUtoo@no-log.org Date: Thu Mar 28 14:24:39 2013 +0100
Intel i945: ACPI: Add _OSC method
Add the ACPI Operating System Capabilities Method and let the operation system control everything.
Commit »AMD Fam14 DSDT: Add OSC method« (00a0e76b) [1] is used as a template.
The Lenovo X60 [2] running the Parabola GNU/Linux distribution [3] is used for testing.
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
[1] http://review.coreboot.org/2738 [2] http://www.coreboot.org/Lenovo_x60x [3] https://parabolagnulinux.org/
Change-Id: I1caffa44eea447d553c01caaf431f2db241ea5ea Signed-off-by: Denis 'GNUtoo' Carikli GNUtoo@no-log.org Signed-off-by: Paul Menzel paulepanter@users.sourceforge.net Reviewed-on: http://review.coreboot.org/2938 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich rminnich@gmail.com
Build-Tested: build bot (Jenkins) at Wed Apr 10 13:48:07 2013, giving +1 Reviewed-By: Ronald G. Minnich rminnich@gmail.com at Thu Apr 18 02:48:01 2013, giving +2 See http://review.coreboot.org/2938 for details.
-gerrit