Date: Thu, 24 Mar 2005 09:04:17 -0500 From: Ian Soboroff <ian.soboroff@nist.gov> To: freebsd-acpi@freebsd.org Subject: Re: Suspend power drain problems Message-ID: <9cfzmwtdtsu.fsf@rogue.ncsl.nist.gov> In-Reply-To: <200503181150.02355.mistry.7@osu.edu> (Anish Mistry's message of "Fri, 18 Mar 2005 11:49:53 -0500") References: <200503181150.02355.mistry.7@osu.edu>
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Anish Mistry <mistry.7@osu.edu> writes: > I've posted about this before, but now all the power management acpi > code seems to be imported and I've got a bit of time to test things > so I'll ask again. My Fujitsu P2110 is able to suspend and resume > correctly and has been able to do it for quite some time now :). > The problem is that the battery drains abnormally fast verses when I > have it suspended in Windows 2000. I'm using the acpi_video DPMS > patch that helps significantly, but after a day the battery is still > fully drained, where as with Windows it only dropped a few percent. > I've got hw.pci.do_powerstate=1 set so I'm assuming the default power > management for pci devices is working, but this doesn't seem to help > my system. To that end what can I do to debug this problem and tell > what devices aren't being shutoff and are draining the power? I also have the same laptop (and the same problem) and am willing to test fixes! I first noticed this when I switched the laptop from Linux, where I used to suspend with APM. When Anish helped me get ACPI suspend to work, I noticed that the battery drains much more quickly while suspended under FreeBSD than under APM suspend from Linux. (I can't compare to ACPI suspend under Linux, I was never able to get that work...) Ian
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