Red Hat Bugzilla – Bug 810587
UPower provides incorrect battery power information
Last modified: 2013-02-13 09:42:57 EST
Created attachment 575830 [details]
Power Statistics window showing large deviations in discharge accuracy
Description of problem:
The UPower component in the latest releases, including Fedora 15 and Fedora 16, provides incorrect and fluctuating information on the amount of remaining battery back-up time when the laptop is running on battery. My laptop is a Dell Inspiron 1545 with an original Dell 9-cell battery pack. The amount of available battery time shown keeps varying from around 7 hours (not possible on my system) to around 2 hours, at almost all times, no matter what the battery level. However, it tends to get more accurate as the battery drains. Correct information is almost never shown when the battery charge is more than 50%.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Log in to a Fedora 16 installation on a Dell Inspiron 1545 on battery power.
2. Check the amount of remaining battery back-up time shown.
Amount of time shown is incorrect.
Amount of time shown is correct.
I know that this is a bug in UPower or some such upstream component because the problem occurs consistently on all the latest Linux distributions irrespective of other components such as the kernel, and it did not occur in earlier distributions (more than approximately 18 months old) which either used older versions of UPower or used HAL instead of UPower.
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Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is
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