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Message-ID: <20080523094039.GH4287@sgi.com> Date: Fri, 23 May 2008 04:40:39 -0500 From: Robin Holt <holt@....com> To: Pavel Machek <pavel@....cz> Cc: Robin Holt <holt@....com>, astarikovskiy@...e.de, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: Sony laptop battery has odd behavior with 2.6.26-rc3ish build. Definitely the battery. I just rebooted to XP and did a similar experiment with their battery monitor and it behaved equivalently (although they present only percentages). So, I would say this is something unrelated and was just finally noticed because I was paying more attention. Thanks, Robin On Fri, May 23, 2008 at 03:43:46AM -0500, Robin Holt wrote: > I think this is my battery/laptop ACPI. I just booted back to 2.6.22-14 > and the behavior remained the same. Interestingly, it started chaged > to 4096mAh and I unplugged it. The battery began discharging. When it > reached 3800mAh, I plugged it back in. The battery indicated it was > charging, but remaining capacity slowly declined to 3072mAh where it > stablized. Removing/Instaling the battery gave no change in behavior, > upon reinsertion, the reading remained at 3072mAh. I then unplugged the > charger. It was approx 35 seconds before the reading began to trickle > back down. Again, it trickled down slowly (which it is doing currently). > > Either it has always behaved this way and I just didn't notice it or > something has changed inside my battery. I have not done any BIOS update > in years (last one that was available). > > Thanks, > Robin > > On Fri, May 23, 2008 at 09:21:56AM +0200, Pavel Machek wrote: > > Hi! > > > > > A couple days ago, I updated my test build to commit > > > 8033c6e9736c29cce5f0d0abbca9a44dffb20c39 and noticed an odd behavior > > > with the battery. If I unplug the power, the battery discharges and > > > that is reflected in /proc/acpi/battery/BAT0/state. I am not certain > > > the discharge is continuous and uniform or if it goes in steps. When I > > > plug the power back in, the level stays at a constant value (+-1mAh) > > > for a considerable period of time. It then does a single step back to > > > the fully charged value. > > > > > > I have not done any searching to see when this began. I had been running > > > the ubuntu 2.6.22-14 kernel before this and the behavior was normal. > > > > > > I am not certain what information you will need. Commit is above. > > > > git bisect would certainly help... > > > > > $ cat /proc/acpi/battery/BAT0/alarm > > > alarm: unsupported > > > $ cat /proc/acpi/battery/BAT0/info > > > present: yes > > > design capacity: 4800 mAh > > > last full capacity: 4096 mAh > > > battery technology: non-rechargeable > > > > Because something is clearly wrong here. > > > > Pavel > > -- > > (english) http://www.livejournal.com/~pavelmachek > > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@...r.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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