kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Tags added: bios-outdated-r2087h4

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https://bugs.launchpad.net/bugs/1027522

Title:
  1002:6760 Power consumption higher after resume, probably
  vgaswitcheroo/radeon related

Status in The Linux Kernel:
  Confirmed
Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  I noticed that the power consumption, as reported in

  /proc/acpi/battery/BAT1/state

  gets higher when I resume my laptop from suspend to RAM. I strongly
  suspect that this is related to a bug in vgaswitcheroo or the radeon
  driver, since the power used after resume is consistent with the power
  used when the discrete video card is not off.

  Before resume I made sure the discrete card was off by using

  sudo bash -c "echo OFF > /sys/kernel/debug/vgaswitcheroo/switch"

  At resume, with high power consumption, the state is reported as
  expected:

  sudo cat /sys/kernel/debug/vgaswitcheroo/switch
  0:IGD:+:Pwr:0000:00:02.0
  1:DIS: :Off:0000:01:00.0

  Still, if I run:

  sudo bash -c "echo ON > /sys/kernel/debug/vgaswitcheroo/switch"
  sudo bash -c "echo OFF > /sys/kernel/debug/vgaswitcheroo/switch"

  Now the power consumption goes down to the expected level.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image (not installed)
  ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
  Uname: Linux 3.2.0-26-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu5
  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:  alex       2005 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xc9400000 irq 51'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:10ec0275,104d5000,00100005 HDA:80862805,104d5000,00100000'
     Controls      : 26
     Simple ctrls  : 10
  Date: Sun Jul 22 01:23:17 2012
  HibernationDevice: RESUME=UUID=6b1034dd-b958-4939-88b4-829282357ed6
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110930)
  MachineType: Sony Corporation VPCSB2C5E
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-26-generic root=UUID=d4bbd7c4-dc64-42f6-a165-073e9b828c86 ro pcie_aspm=force i915.i915_enable_rc6=1
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-26-generic N/A
   linux-backports-modules-3.2.0-26-generic  N/A
   linux-firmware                            1.79
  SourcePackage: linux
  StagingDrivers: rts_pstor mei
  UpgradeStatus: Upgraded to precise on 2012-04-27 (85 days ago)
  dmi.bios.date: 04/25/2011
  dmi.bios.vendor: INSYDE
  dmi.bios.version: R1031H4
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnINSYDE:bvrR1031H4:bd04/25/2011:svnSonyCorporation:pnVPCSB2C5E:pvrC609LHCC:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VPCSB2C5E
  dmi.product.version: C609LHCC
  dmi.sys.vendor: Sony Corporation

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