Some information to breathing led:
1. There is a patent on this behaviour (i.e.
http://www.google.com/patents/US6658577), and some may not want to
implement it.
2. It is usually implement by EC by detecting hardware pins. For example,
SLP_S3#, SLP_S4# and perhaps others:
==========================================================
S3 Sleep Control: SLP_S3# is for power plane control.. This signal shuts off
power to all non-critical systems when in S3 (Suspend To RAM), S4 (Suspend to
Disk), or S5 (Soft Off) states.
S4 Sleep Control: SLP_S4# is for power plane control. This signal shuts power
to all non-critical systems when in the S4 (Suspend to Disk) or S5 (Soft Off)
state.
==========================================================
The above pins are not controlled by software at all and they will
change according when the system (ex. chipset) is put to s3 and s4.
The questions we need to ask ODM are 1. whether they implement the
breathing led, 2. whether EC is used to detect pins, 3. what other
software method to control it, if any.
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1219687
Title:
[Dell XPS 13 L322X] LED won't blink during suspend.
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
CID: 201209-11840 Dell XPS 13
According to serval video clips on youtube, the power LED should blink
during suspend.
But it didn't blink on this system during suspend.
[1] http://www.youtube.com/watch?v=7TSKNi-VOo8
[2] http://www.youtube.com/watch?v=z7A2aiyzj8U&t=40s
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.8.0-29-generic 3.8.0-29.42~precise1 [modified:
boot/vmlinuz-3.8.0-29-generic]
ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
Uname: Linux 3.8.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
Date: Mon Sep 2 03:37:36 2013
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64
(20130820.1)
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-lts-raring
UpgradeStatus: No upgrade log present (probably fresh install)
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version
k3.8.0-29-generic.
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC275 Analog [ALC275 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 1554 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xd0510000 irq 45'
Mixer name : 'Intel PantherPoint HDMI'
Components : 'HDA:10ec0275,1028058b,00100008
HDA:80862806,80860101,00100000'
Controls : 29
Simple ctrls : 11
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=7cf28595-73f5-41ba-b4a2-c7839c56eaec
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64
(20130820.1)
MachineType: Dell Inc. Dell System XPS L322X
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic.efi.signed
root=UUID=f0ed3242-8409-4aac-b950-6e8b8cd1ff74 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
RelatedPackageVersions:
linux-restricted-modules-3.8.0-29-generic N/A
linux-backports-modules-3.8.0-29-generic N/A
linux-firmware 1.79.6
Tags: precise running-unity
Uname: Linux 3.8.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 04/18/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias:
dmi:bvnDellInc.:bvrA08:bd04/18/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L322X
dmi.sys.vendor: Dell Inc.
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