intel_pstate has too aggressive frequency selection
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Medium
|
Unassigned |
Bug Description
I was recently upgrading from Ubuntu Gnome 15.10 to 16.04 on my ThinkPad. Before the frequency-scaling chose the minimum possible frequency when the system was on low load. Now, when I allow the CPU to choose anything between the lowest and highest possible frequency, it sticks to the highest frequency for 90% of time and only occasionally drops to the low frequency.
I can confirm (htop) that my system load is practically zero. Also the CPU Power Manager Applet from Gnome Shell works well, because I can force low frequency by reducing the maximum allowed frequency and can also switch off Turbo Boost.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-generic 4.4.0.28.30
ProcVersionSign
Uname: Linux 4.4.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: GNOME
Date: Sat Jul 2 12:11:42 2016
EcryptfsInUse: Yes
HibernationDevice: RESUME=
InstallationDate: Installed on 2016-03-19 (104 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: LENOVO 20C0003SFR
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=de_DE.UTF-8
SHELL=/usr/bin/zsh
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.157.1
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-07-02 (0 days ago)
dmi.bios.date: 11/07/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: B0ET24WW (1.11 )
dmi.board.
dmi.board.name: 20C0003SFR
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 20C0003SFR
dmi.product.
dmi.sys.vendor: LENOVO
Added attachment