Red Hat Bugzilla – Bug 469568
High Rate of Battery Drain
Last modified: 2013-01-30 21:48:52 EST
Description of problem:
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Unplug the power cord and put laptop on battery
2. Battery drains very fast.
3. Down 10% within 2 minutes
Actual results: Down 10% within 2 minutes
Expected results: Down 10% within 30 minutes
Additional info: uname -a > 22.214.171.124-68.fc10.i686
My Laptop is a Sony Viao VGN-FW139E.
The output of the /proc/acpi/battery/BAT0/info is:
design capacity: 50610 mWh
last full capacity: 50350 mWh
battery technology: non-rechargeable
design voltage: 124720 mV
design capacity warning: 1000 mWh
design capacity low: 400 mWh
capacity granularity 1: 100 mWh
capacity granularity 2: 100 mWh
battery type: LiOn
OEM info: Sony Corp.
The output of /proc/acpi/battery/BAT0/state is
capacity state: ok
charging state: discharging
present rate: 18720 mW
remaining capacity: 42110 mWh
present voltage: unknown
Under Windows Vista, the battery lasted 3 hours.
Also, when the laptop is on battery, the screen does not dim as it should. The power-manager claims that the screen is dimmed, but it is still at 100%. Using the keyboard (Fn-F5) does not dim the screen either.
This bug appears to have been reported against 'rawhide' during the Fedora 10 development cycle.
Changing version to '10'.
More information and reason for this action is here:
The same effect on fresh new HP Pavilion dv5-1150 with F11 RC4. Except screen is dimed and keyb Fn-F5 works OK.
Under F11 battery last only for 1 hour with no user apps started. Only GNOME desktop.
Under Vista installed on the other partition it lasts 3 hours.
Because I have no access to the machine roght now, I'll try to send listings from /proc/acpi.. later and from dmesg output ( remember ACPI exception in this output ).
BTW. Maybe bump up the version to 11 ????
Sending outpu of dmesg, battery info and settings I used to manage to obtain ~ 1.5 hour of battery life under no load and ~ 1 hour with browsing with firefox various sites including those with flash content.
Created attachment 347163 [details]
Zipped output from dmesg, battery info and settings from rc.local
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Please bump the version to 11. The bug still exist in F11 version. I'll try to test it on F12 now released.
also having this problem in F12. Using powertop <kernel_core>: hrtimer_start_range_ns (tick_sched_timer) causes 466.7 wakeups and radeon causes 101.5 on my Inspiron 6400. Battery life is less than 2 hours in linux. In Vista, the battery life is 4 hours.
Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.
If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version.
Thank you for reporting this bug and we are sorry it could not be fixed.
Tried on F12 on mentioned earlier HP Pavilion dv5-1150. Sadly, the bug still exist in F12 version. The same effect as of F11.
Please bump the version to 12.
Partha Bagchi, could You be so kind and reopen bug with F12 version?