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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

Power consumption sampled with powerstat on 201208-11536 Dell Latitude
6430u

Sample rate: 15s, with 360 data points (90 min)
Result:
  A. Without the "options snd-hda-intel power_save_controller=N"
      1. with "sudo pm-powersave false"
          4.18 Watts on Average with Standard Deviation 0.27 
      2. with "sudo pm-powersave true"
          4.17 Watts on Average with Standard Deviation 0.24  
  B. With the "options snd-hda-intel power_save_controller=N"
      1. with "sudo pm-powersave false"
            4.13 Watts on Average with Standard Deviation 0.20  
      2. with "sudo pm-powersave true"
            4.13 Watts on Average with Standard Deviation 0.17  

Hardware config:
This is a laptop with SSD, with wireless card removed, and Media Card / Mic / Camera / WWAN / WLAN / BT disabled in BIOS.

System settings:
* 14.04.1 + update
* auto update disabled
* no lock after sceen off
* idle time set to 1min
* Keyboard backlight off
* screen backlight set to minimum
* ifconfig will be disabled later

Scenario:
1. With laptop powered off, disconnect the cable after the battery is fully charged
2. Power it on around 5 seconds later after unplugging the adapter
3. Run a test script manually right after boot into desktop:
#!/bin/bash
sudo ifconfig eth0 down
sudo pm-powersave false
powerstat 15 360 | tee 1-powersave-false
4. Leave it there for 90 minutes, then modify the script (or add parameter) for next cycle, power off.

Attachment is the test report and the alsa-base.conf config file 
Please double confirm this with another tester.
Thank you

** Attachment added: "powerstat.tar.gz"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1383997/+attachment/4340960/+files/powerstat.tar.gz

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https://bugs.launchpad.net/bugs/1383997

Title:
  HDMI audio hot-plug detection does not work well with laptop running
  on battery with 14.04

Status in HWE Next Project:
  Triaged
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  CID: 201307-14037 Dell Vostro 5470

  There is no HDMI audio output option available when you connect the
  HDMI monitor (with speaker) to this system.

  Verified with cold plug, still no luck.

  However, HDMI audio could be detected with cold plug on 12.04.4 (3.11
  kernel) stock Ubuntu, tested with LiveUSB

  Alsa-info:
  http://www.alsa-project.org/db/?f=8e5ccdaae7aa4b3a05862385b902f824be65f0bd

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-37-generic 3.13.0-37.64
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1589 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     1589 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  Date: Tue Oct 21 22:44:45 2014
  HibernationDevice: RESUME=UUID=420e55c0-b179-44d6-93d7-82393cdeec68
  InstallationDate: Installed on 2014-10-21 (0 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Vostro 5470
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic.efi.signed root=UUID=a975e1af-1e52-4f17-8e69-190b4dc36b48 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-37-generic N/A
   linux-backports-modules-3.13.0-37-generic  N/A
   linux-firmware                             1.127.7
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/23/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A01
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: White Tip Mountain
  dmi.board.vendor: Intel Corp.
  dmi.board.version: FAB3
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Intel Corporation
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA01:bd08/23/2013:svnDellInc.:pnVostro5470:pvr:rvnIntelCorp.:rnWhiteTipMountain:rvrFAB3:cvnIntelCorporation:ct9:cvr0.1:
  dmi.product.name: Vostro 5470
  dmi.sys.vendor: Dell Inc.

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