Red Hat Bugzilla – Bug 1029627
Power management with multiple batteries broken
Last modified: 2013-11-18 13:41:44 EST
Created attachment 823105 [details]
Image showing incorrect calculation for time remaining
Description of problem:
I have two batteries on my ThinkPad 420s. One is a 6-cell and the other is a 3-cell. The laptop firmware discharges the 3-cell one completely before switching to the 6-cell one. When the 3-cell one nears full discharge, gnome thinks the laptop is going to run out of power.
As shown in the attachment, the % remaining calculation is correct, and takes both batteries into account. But the time remaining estimate is incorrect, and only based on the currently-discharging battery.
So gnome keeps suspending my laptop till the firmware switches to the 6-cell battery.
Once that happens, the time remaining is updated to reflect the 6-cell battery's discharge rate.
This is a regression from F19.
Version-Release number of selected component (if applicable):
$ rpm -q gnome-shell
gnome-settings-daemon-3.10.2 fixes this.