default M10 standby power is high and noisy
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Canonical System Image |
New
|
Undecided
|
Unassigned | ||
| The Avila project |
New
|
Undecided
|
Unassigned | ||
| cooler |
New
|
Undecided
|
Unassigned | ||
| frieza |
New
|
Undecided
|
Unassigned | ||
Bug Description
In a fresh-flashed state with wifi enabled, the M10's power usage is higher than it should be, and noisy. The average power draw ranges from 60mA to 90mA, meaning a standby time of 3 to 5 days. However, the momentary power draw rapidly jumps between ~10mA and ~200mA. This is similar to how krillin behaved in early versions.
Turning off wifi reduces standby power to a steady 12mA, for 25 days of standby time.
I tested recent rc-proposed images (190 to 198) and rc images (13 to 18), and the behavior is consistent. There is likely a kernel-level wifi bug similar to what krillin used to have.
Steps to reproduce the issue:
1. Flash a fresh image, wiping everything.
2. Connect to a wifi access point.
3. Let the device go into standby mode.
Expected results: 12mA to 24mA average power (at a rough guess, up to 2X as high as with wifi off).
Actual results: 60mA to 90mA average power.
| Selene ToyKeeper (toykeeper) wrote | #1 |
| Selene ToyKeeper (toykeeper) wrote | #2 |
| John McAleely (john.mcaleely) wrote | #3 |
| information type: | Proprietary → Public |
| Changed in canonical-devices-system-image: | |
| milestone: | none → x1 |
Graph of power use for three test runs, using rc-proposed 198. Shows moment-to-moment power use. Logs are available here:
http://