I have added pcie_aspm=force to my kernel (2.6.38, Natty) command line and
rebooted. It is picked up:
"PCIe ASPM is forcedly enabled"
It still seems diabled:
"ACPI FADT declares the system doesn't support PCIe ASPM, so disable it"
lspci shows its only enabled for the controller and the nvidia card:
:~$ sudo lspci -vvv|grep -i aspm
LnkCap: Port #2, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency
L0 <256ns, L1 <4us
LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain-
CommClk+
LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency
L0 <64ns, L1 <1us
LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk-
LnkCap: Port #1, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency
L0 <1us, L1 <4us
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
LnkCap: Port #2, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency
L0 <256ns, L1 <4us
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
LnkCap: Port #3, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency
L0 <1us, L1 <4us
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
LnkCap: Port #4, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency
L0 <1us, L1 <4us
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
LnkCap: Port #5, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency
L0 <1us, L1 <4us
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk-
LnkCap: Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency
L0 <512ns, L1 <4us
LnkCtl: ASPM L0s L1 Enabled; RCB 128 bytes Disabled- Retrain-
CommClk+
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency
L0 <128ns, L1 <64us
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
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https://bugs.launchpad.net/bugs/760131
Title:
Power consumption raised significantly in natty
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