Ticket #10033 (closed defect: fixed)

Opened 5 years ago

Last modified 4 years ago

EC half-heartedly indicates battery about to run out of charge

Reported by: wad Owned by: rsmith
Priority: normal Milestone: 1.5-software-later
Component: embedded controller Version: Development firmware
Keywords: Cc:
Action Needed: add to build Verified: no
Deployments affected: Blocked By:


I was using a production XO-1.5 with a lightly charged battery. After a few minutes, I saw the battery LED flash yellow then red. This was repeated around five minutes later, and then probably three minutes later. Finally, it started flashing quickly and then the laptop shut down.

The laptop was running os110 (and matching firmware).

At no time did the laptop show the "constant red" low battery warning. The laptop was suspending regularly.

Change History

Changed 4 years ago by Quozl

  • next_action changed from diagnose to finalize
  • milestone changed from 1.5-software-update to 1.5-software-later

Tested on Q3A36 with a near empty battery. EC shows red for a while, then alternating red and yellow, then the laptop turns off.

Appears fixed. Richard?

Changed 4 years ago by rsmith

  • next_action changed from finalize to add to build
  • version changed from Development build as of this date to Development firmware

Problem occurs while suspending when the battery voltage is in the critical zone.

Current EC HEAD adds a .5V hysteresis on clearing the critical flag.

Changed 4 years ago by rsmith

  • status changed from new to closed
  • resolution set to fixed

Fixed in latest release

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