touch-packages team mailing list archive

[Pat McGowan <pat.mcgowan@xxxxxxxxxxxxx>]

I had a drainoff last night on mako and had cpustat running, which points at upowerd
A number of samples like the following :

 %CPU   %USR   %SYS   PID   Task
 17.76  16.87   0.90  1493 /usr/lib/upower/upowerd
  0.80   0.40   0.40  4319 cpustat
  0.80   0.10   0.70  1180 /system/bin/mpdecision
  0.60   0.00   0.60   134 [mmcqd/0]
  0.50   0.00   0.50   234 [jbd2/mmcblk0p23]
  0.50   0.00   0.50 29761 [kworker/0:3]
  0.30   0.00   0.30   971 /lib/systemd/systemd-udevd
  0.30   0.30   0.00  2579 [kworker/0:2]
  0.30   0.20   0.10  2724 unity8
  0.20   0.20   0.00   848 dbus-daemon
  0.10   0.00   0.10   776 rsyslogd
  0.10   0.10   0.00  1593 init
  0.10   0.00   0.10  1179 /system/bin/thermald
  0.10   0.10   0.00     1 /sbin/init
  0.10   0.00   0.10    23 [sync_supers]
  0.10   0.10   0.00   750 upstart-file-bridge
  0.10   0.00   0.10  1346 [MC_Thread]
  0.10   0.00   0.10 21367 [kworker/u:0]
  0.10   0.00   0.10  2702 /usr/lib/arm-linux-gnueabihf/indicator-power/indicator-power-service

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to powerd in Ubuntu.
https://bugs.launchpad.net/bugs/1372413

Title:
  Extensive battery drain on RTM

Status in the base for Ubuntu mobile products:
  In Progress
Status in powerd package in Ubuntu:
  Confirmed

Bug description:
  Mako, RTM 1

  Since upgrading to RTM the battery life is really poor. What used to
  be a battery drain of 5-10% per hour (which is still high) is now
  10-15% per hour. Sometimes the phone runs really hot, so there seem to
  be something going on in the background that is consuming power. I
  mostly have bluetooth, GPS (which isn't always working), wifi and
  cellular on, but that's no difference from when I was running 'devel-
  proposed' with MultiROM with much less battery consumption.

  As an example, I started with a full charge at 7am. After some web
  surfing (<15 mins) and watching a couple of youtube videos (on wifi)
  battery was down to 66% at 9:15. That's 34% in just over two hours! I
  recharged again before lunch and had the phone idle until coming back
  1 hour and 45 mins later to find only 75% of battery left, this time
  without the phone running particularly hot.

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