The Leading Cause Of The Recent Linux Kernel Power Problems

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It seems that the Arch Linux people found a solution to this problem before Michael:

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They should get some of the advertising revenue :p

For me, a BIOS update actually made things worse on my laptop (HP dv6-3210us, RadeonHD42x0). Now, even with the force flag, I get the dreaded:

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[    0.142500] Unable to assume _OSC PCIe control. Disabling ASPM

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sigh..

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Originally Posted by DanL

Now, even with the force flag, I get the dreaded:

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[    0.142500] Unable to assume _OSC PCIe control. Disabling ASPM

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sigh..

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I get the above message about _OSC PCIe control too, but I am still able to set the following:

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$ cat /sys/module/pcie_aspm/parameters/policy
default performance [powersave]

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Doesn't the /sys filesystem have the final say in whether Linux has activated something or not?

http://www.heise.de/open/news/foren/...20449341/read/

Translated:
Normally Windows activates ASPM, when Root Complex (Chipset) and Endpoint (PCIe-card) in ConfigSpace indicate that they support the L0s and L1 energy saving mode. Windows Vista/7 is obligatory.

There are several switches that control the behaviour including Windows INF and registry keys. The feature is not enabled with an older PCIe-version. Also windows checks, according to the PCIe-Spec recommendations, how much time a mode switch takes and if it can involve a buffer overflow.

The ASPM setting in the FADT, initially set by the BIOS, can be overwritten by Windows. See also http://download.microsoft.com/downlo...pa070_wh06.ppt.

Maybe also a good way to implement it on Linux:

http://www.heise.de/open/news/foren/...20449341/read/

Translated:
Normally Windows activates ASPM, when Root Complex (Chipset) and Endpoint (PCIe-card) in ConfigSpace indicate that they support the L0s and L1 energy saving mode. Windows Vista/7 is obligatory.

There are several switches that control the behaviour including Windows INF and registry keys. The feature is not enabled with an older PCIe-version. Also windows checks, according to the PCIe-Spec recommendations, how much time a mode switch takes and if it can involve a buffer overflow.

The ASPM setting in the FADT, initially set by the BIOS, can be overwritten by Windows. See also http://download.microsoft.com/downlo...pa070_wh06.ppt.

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Originally Posted by RoyD

Maybe also a good way to implement it on Linux:

http://www.heise.de/open/news/foren/...20449341/read/

Translated:
Normally Windows activates ASPM, when Root Complex (Chipset) and Endpoint (PCIe-card) in ConfigSpace indicate that they support the L0s and L1 energy saving mode. Windows Vista/7 is obligatory.

There are several switches that control the behaviour including Windows INF and registry keys. The feature is not enabled with an older PCIe-version. Also windows checks, according to the PCIe-Spec recommendations, how much time a mode switch takes and if it can involve a buffer overflow.

The ASPM setting in the FADT, initially set by the BIOS, can be overwritten by Windows. See also http://download.microsoft.com/downlo...pa070_wh06.ppt.

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Maybe if you'd mail that to the Linux Kernel Mailing List, you'd get some desicionmaking eyeballs (programmer eyeballs) to fix the issue :eek: