kernel-packages team mailing list archive

[Nicolás Abel Carbone <nicocarbone@xxxxxxxxx>]

The bug is present in the last upstream kernel. Tagging this bug a such.

Thank you!

** Tags added: kernel-bug-exists-upstream

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1299523

Title:
  PRIME dynamic GPU switching does not turn off the dedicated GPU until
  after a suspend-resume cycle

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I have a HP Envy 14 laptop with a Intel Ironlake / AMD 5650m
  switchable graphics.

  It is correctly detected and configured as such using
  PRIME/runpm/vgaswitcheroo dynamic GPU switching and I can successfully
  use both GPUs. By default, the Integrated GPU is used to do OpenGL
  rendering and, if I use the DRI_PRIME=1 variable, the discrete GPU
  (dGPU) can be used as OpenGL renderer.

  The thing that is not working properly is that the discrete GPU is not
  automatically switched off when not in use. If I cat
  /sys/kernel/debug/vgaswitcheroo/switch I always obtain the following:

  0:DIS: :DynPwr:0000:01:00.0
  1:IGD:+:Pwr:0000:00:02.0
  2:DIS-Audio: :Pwr:0000:01:00.1

  Meaning that the dGPU is on, but should be turned off when not in use,
  but it never happens despite the fact that the dGPU is not in use. As
  a result, battery life decreases and temperature and power consumption
  increases notably.

  What is weird, is that if the notebook goes through a suspend - resume
  cycle, PRIME starts to work as expected. After resuming, cat
  /sys/kernel/debug/vgaswitcheroo/switch returns:

  0:DIS: :DynOff:0000:01:00.0
  1:IGD:+:Pwr:0000:00:02.0
  2:DIS-Audio: :Off:0000:01:00.1

  and only goes to DynPwr when I use the dGPU through DRI_PRIME=1. It
  goes back to DynOff after some seconds without dGPU usage. This
  "solution" only last until next reboot.

  Is there anything I can do in order to make PRIME switch off my dGPU
  automatically without going through a suspend-resume cycle?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-20-generic 3.13.0-20.42
  ProcVersionSignature: Ubuntu 3.13.0-20.42-generic 3.13.7
  Uname: Linux 3.13.0-20-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  nicolas    2405 F.... pulseaudio
   /dev/snd/controlC0:  nicolas    2405 F.... pulseaudio
   /dev/snd/pcmC0D0p:   nicolas    2405 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Sat Mar 29 14:23:38 2014
  HibernationDevice: RESUME=UUID=1c8681ad-8f9c-4447-a49f-52416dba9f57
  InstallationDate: Installed on 2013-09-23 (186 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130923.1)
  MachineType: Hewlett-Packard HP ENVY 14 Notebook PC
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-20-generic root=UUID=ca667e96-4f50-4077-8344-88c49b0769a2 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-20-generic N/A
   linux-backports-modules-3.13.0-20-generic  N/A
   linux-firmware                             1.126
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-03-28 (0 days ago)
  dmi.bios.date: 12/01/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: F.26
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 1436
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 59.24
  dmi.chassis.asset.tag: CNU03538DZ
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnHewlett-Packard:bvrF.26:bd12/01/2011:svnHewlett-Packard:pnHPENVY14NotebookPC:pvr0492100000241910000620000:rvnHewlett-Packard:rn1436:rvr59.24:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP ENVY 14 Notebook PC
  dmi.product.version: 0492100000241910000620000
  dmi.sys.vendor: Hewlett-Packard

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1299523/+subscriptions