[Adding cc's to linux-pm and linux-acpi and ] On Fri, Oct 2, 2009 at 1:44 PM, Andrew Lutomirski <luto@xxxxxxx> wrote: > Hi all- > > I'm running a git kernel that's slightly newer than 2.6.32-rc1. > > First, thanks for all the great work everywhere on laptop power > consumption -- on my Lenovo X200s, it looks like Linux is getting > close to Windows (Windows wins by about 0.7W, except that its power > usage frequently spikes since Windows apparently still doesn't know > how to sit still and do nothing, whereas Linux's seems more stable.), > even running KDE with compositing enabled and > while connected to wifi, at least after some tweaking. [fixed irrelevant typo above, too.] > > There's a catch, though: after a suspend/resume cycle, power > consumption goes up by over well over a watt. (On a system that draws > about 7 watts before suspending, that's a big deal.) I've tried > turning off X, suspending with 'echo mem > /sys/power/state' to avoid > any distro scripts running, and manually restoring SATA power saving > settings, but it still happens. I even tried unbinding e1000e and > both USB drivers, unloading the i2400 (wimax) driver, iwlagn, and > iwlcore, and it still happens. This is 100% reproducible, and I'd be > happy to test things. > > This could be a BIOS bug I suppose (although I'm running the latest > BIOS), but Windows 7 does not have this problem at all. > > Any ideas about what to try or what subsystem to blame? > > I'm running Fedora 11 if that makes any difference. This is actually more like 90% reproducible. I've gotten it to stay in low power after suspend a couple times with HAL disabled, but I can't reliably reproduce *that*, either. > > Thanks, > Andy > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
