Battery drain while suspended
Open, Needs TriagePublic

Description

As reported here there is high battery drain while suspended (out of the box PureOS setup). Affected models seem to include 13v2, 15v2, 15v3. Bios include Coreboot 4.7-Purism-4 and AMI. OS include PureOS, Debian, Ubuntu.

jenda created this task.May 9 2018, 8:47 AM

This could indeed be related to stripped firmware as the firmware we strip out (the intel nonfree firmware) indeed contain power management parts.

On boot I am seeing

Failed to load DMC firmware i915/skl_dmc_ver1_26.bin. Disabling runtime power management.

bruno added a subscriber: bruno.May 12 2018, 10:03 PM
devnull added a subscriber: devnull.EditedJul 24 2018, 4:50 PM

I am also experiencing the drain issue. However, I am running Ubuntu 18.04 and seeing:

[    1.564862] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_26.bin (v1.26)

So I don't think the error above is related. I ordered Samsung memory and will see if it makes a difference.

I can confirm that the Samsung memory corrects the issue under Ubuntu.

Part number M471A2K43CB1-CRC.

tasty added a subscriber: tasty.Aug 8 2018, 5:33 PM

is this a possible relation too https://tracker.pureos.net/T530

My new RAM is CT16G4SFD824A C16FE
My old RAM was CT16G4SFD8213 C16FH1

An overnight suspend of ~8h resulted in 86%–>79%, or ~7% battery charge loss, a marked improvement from the ~60% I was seeing.

thegoat added a subscriber: thegoat.Aug 8 2018, 6:02 PM

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