search for: link_power_management_policy

Hello, I was not happy with the power consumption of CentOS 6 x86_64 on a new Lenovo Thinkpad x220 Tablet and I worked on reducing it. I just wanted to share with the list one of the changes which gave me the most significant improvement. As per http://www.williambrownstreet.net/blog/?p=387, add the following kernel arguments to the GRUB boot configuration: pcie_aspm=force

...ot 4096 May 2 10:15 em_message -r--r--r--. 1 root root 4096 May 2 10:15 em_message_supported -r--r--r--. 1 root root 4096 May 2 10:15 em_message_type -r--r--r--. 1 root root 4096 May 2 10:15 host_busy --w-------. 1 root root 4096 May 2 10:15 host_reset -rw-r--r--. 1 root root 4096 May 1 18:00 link_power_management_policy drwxr-xr-x. 2 root root 0 May 2 10:15 power/ -r--r--r--. 1 root root 4096 May 2 10:15 proc_name -r--r--r--. 1 root root 4096 May 2 10:15 prot_capabilities -r--r--r--. 1 root root 4096 May 2 10:15 prot_guard_type --w-------. 1 root root 4096 May 2 10:15 scan -r--r--r--. 1 root root 4096 May...