Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

Webupd8 reported this power management fix for the 2.6.38 Linux kernel regression:

Add the following to the boot grub line "pcie_aspm=force"

My question - how does this suggested fix differ from this hint from powertop:

Suggestion: Enable Device Power Management by pressing the P key, which execute the following action:

find /sys/devices/pci* -path "*power/control" -exec bash -c "echo auto > '{}'" \;

share|improve this question
1  
thanks, binarylife, very well edited. –  dago Jun 28 '11 at 18:47
    
Where is the question? If have an answer for your own question, just add the answer below. –  Lekensteyn Jun 28 '11 at 18:51
1  
OK the question is do both measures do the same? –  dago Jun 28 '11 at 19:30
add comment

1 Answer 1

up vote 1 down vote accepted

The power management regression you are referring to was actually the Linux kernel learning to respect the BIOS when it says "these devices don't support PCIe ASPM". Now, sometimes (often!) the BIOS is wrong about this, but should your system start to randomly hang after forcing this option on, one candidate is that you've force-enabled a broken hardware feature.

  • You can help test the fix by going to this wiki page.
share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.