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