From: Soeren S. <mac...@nn...> - 2008-05-06 03:07:53
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On Mon, 2008-05-05 at 21:49 +0200, Thomas Vettorel wrote: > Hi all, > > i have a macbook pro that is almost exclusively running linux, almost > always sitting on my desk, plugged in. Last week i ran it on battery, > only to notice that the battery life was even lower than i thought. I > then did the same running mac os for a while, but the machine didn't > last much longer (~30min). Some mac os utility (istat or something) > indicated a "battery health" of about 10%; indeed the results of > 'cat /proc/acpi/battery/BAT0/info' tells me now: > > design capacity: 55000 mWh > last full capacity: 9320 mWh > > I would have blamed it on a faulty cell and bought a new battery, but > something funny happened as i was trying to time how long the battery > really lasts under mac os: the indicator dropped to about 30% (in > roughly 20min), i had a message telling me i should plug the adapter > or something, and then the current capacity somehow jumped back to 62% > (and the machine ran a little while longer than the first estimate had > predicted). > > This led me to wonder whether there might be something linux is doing > (or maybe *not* doing...) that affects the battery health... Of course > this could be just another indication of a dying battery, but i would > like to ask if anybody had a similar experience. You are describing the exact symptoms I was seeing, 2 times now (third battery in place since 1.5 years using this mbp). But all I can tell is that really a new battery fixed this for at least 6 months, so it could be very well normal dying battery symptoms. > Thomas. > > Full output of 'cat /proc/acpi/battery/BAT0/{info,state}': > > present: yes > design capacity: 55000 mWh > last full capacity: 9320 mWh I wonder how long the same battery would last when using osx only. but I somehow question that it is linux killing it... Anyway do you by chance run gnome-power-manager? Soeren. |