Date: Thu, 03 Nov 2016 13:27:10 -0400 From: am_dxer@fastmail.fm To: freebsd-acpi@freebsd.org Subject: thinkpad t410: high power usage during idle until machine is suspended and resumed Message-ID: <1478194030.2139233.776518697.3C9D7614@webmail.messagingengine.com>
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Hello, I recently installed FreeBSD on a Thinkpad t410. I noticed that after suspending and resuming the machine, the power use decreased by about 3 or 4 watts. While searching for what might be causing this, I installed Intel pcm. From this tool, I found that the c3 and c6 package residency states are only being used after I resume from suspend. The normal core c states do work correctly before and after suspend. I applied the settings to rc.conf related to c states from the Powermanagement page of the FreeBSD wiki. Is there any other settings I should try applying to get the package states to work before suspend or is this just a bios bug? There is an updated bios but I figured I would ask here before installing it to see if there is a setting I should try modifying in FreeBSD. I saw in the release notes that the bios was modified to add Windows 8 support. The DSDT changes to support Windows 8 could have broken something else so I am kind of hesitant to update since everything else is working especially reliable suspend and resume. Thanks.
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