[Bug 1912057] Re: Power consumption higher after suspend - Ubuntu 20.10 on Asus UX425JA

https://lkml.org/lkml/2021/6/25/52

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https://bugs.launchpad.net/bugs/1912057

Title:
Power consumption higher after suspend - Ubuntu 20.10 on Asus UX425JA

Status in linux package in Ubuntu:
Incomplete

Bug description:
After boot the idle power consumption is around 2.3 W but after suspend it is 4.7 W.
The measurement is 5-10 min after boot/resume - looking at "top" to see system was idle.
This is consistent - I have tried more that 10 times.
BIOS is updated to latest version.
I have checked power consumption with external meter - and confirmed that it is higher.

I have attached output of:
sudo powertop -t 60 -r --html=before.html (and after)

I have noticed that Package C-state 6 is reached before suspend but
not after.

I expect that idle power consumption after suspend should be the same
as before.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: linux-image-5.8.0-38-generic 5.8.0-38.43
ProcVersionSignature: Ubuntu 5.8.0-38.43-generic 5.8.18
Uname: Linux 5.8.0-38-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: hjh 1448 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Jan 16 15:49:32 2021
EcryptfsInUse: Yes
InstallationDate: Installed on 2021-01-03 (13 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
MachineType: ASUSTeK COMPUTER INC. ZenBook UX425JA_UX425JA
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=da_DK.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-38-generic root=UUID=6296ce1c-eec8-4302-beb1-b4a228780075 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.8.0-38-generic N/A
linux-backports-modules-5.8.0-38-generic N/A
linux-firmware 1.190.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/28/2020
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX425JA.304
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX425JA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.ec.firmware.release: 3.4
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX425JA.304:bd10/28/2020:br5.14:efr3.4:svnASUSTeKCOMPUTERINC.:pnZenBookUX425JA_UX425JA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX425JA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: ZenBook
dmi.product.name: ZenBook UX425JA_UX425JA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

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