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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You received this bug notification because you are a member of Kernel
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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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