I have attached screenshots of each of the graphs shown by the Power Manager during a charge-up. What I did was (1) disabled PM's reaction to critically low battery, (2) used the computer until it just turned off because the battery was exhausted, (3) plugged the computer in, turned it on, and as soon as the desktop appeared I opened the Power Manager's power history applet.
Then I used the computer normally for about five hours and I took the screenshots. The most obvious problem is with the Power History graph (the first one); obviously the power should oscillate around a constant value (I think I remember 20-30W from when the applet worked), not descend to zero. I think the manager confuses it with something charge-related. The Estimated time history looks OK in shape, but I don't get why it's colored half blue and half green---the lid was never closed during this time. The same can be said about the Charge history. The voltage history looks reasonable (with the same observation about its color), though it seems strange to me that it reaches its peak when the Charge history is still very low, below 10%. I thought it was supposed to grow nonlinearly but constantly until the battery is charged. The charge time profile is weird, because it shows no data between 10 and 80%, although it just witnessed a complete charge cycle. The discharge time profile looks reasonable, though it has some blue spots I can't explain. It's also correlated with the previous one. That would seem reasonable (it should have been through charging and discharging about the same number of times). Except that it has large bumps at the extremities---I can explain the one at the top (I usually don't discharge the battery completely), but not the other one. Unless of course it's caused by the fact that the battery percentage was consistently miscalculated, so it _thought_ the battery was empty half the time. (Which is the case, see the discrepancy between graphs 3 and 4.) Can't say anything about the Charge time accuracy profile, though it seems overconfident; the last one is weird a bit, but I don't think I can comment on it as long as the first few suggest the charge is evaluated defectively, since they're just statistics on probably wrong data. ** Attachment added: "8 Discharge time accuracy profile.png" http://launchpadlibrarian.net/9169689/8%20Discharge%20time%20accuracy%20profile.png -- power management applet seems very screwy https://bugs.launchpad.net/bugs/137951 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
