Public bug reported:
Behavior:
CPU frequency management fails to re-engage on resume from suspend. On
resume, the CPUs are stuck around a single frequency (usually a low idle
frequency).
I use indicator-cpufreq for manual governor control. On resume,
indicator-cpufreq indicates the low frequency state in its live cpu
performance display in the icon. However, in its governor menu, it still
shows as in use whichever governor was selected before suspend, even
though that governor is not actually or properly controlling the CPU
state.
Upon manually switching to the unused governor in indicator-cpufreq,
this behavior resolves, and the newly-chosen governor begins performing
its duties. I can then immediately switch back to the desired (pre-
suspend) governor with no issues.
PM logs appear to show a successful resume of cpu frequency management,
even though the modules did not actually gain effective control of the
processor frequencies.
Expected behavior:
On resume, the CPU frequencies should continue being managed as they
were before suspend without the need for manual user input. Also, in
the event that they do not, an error/warning should appear -- if not to
the user, then in the pm suspend/resume logs.
Other information that may or may not be relevant:
On this system, the "powersave" governor is always automatically chosen
at startup, although not until a minute or so after session login. The
choice of an alternate governor "performance" from indicator-cpufreq is
not persistent across reboots. Further, if I manually toggle the
governors at the beginning of my first session after boot, and I settle
on "performance", some automated script will force it back to
"powersave" at the usual time about a minute after login. To use the
"performance" governor, I must select it after waiting an interval
following login, and I must always switch to powersave and back to
performance after each resume from suspend.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-25-generic 3.19.0-25.26
ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
Uname: Linux 3.19.0-25-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: adam 3887 F.... pulseaudio
/dev/snd/controlC1: adam 3887 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Aug 13 11:41:27 2015
InstallationDate: Installed on 2014-08-10 (368 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Hewlett-Packard HP ENVY 15 x360 PC
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-25-generic.efi.signed
root=UUID=5ad8035a-f2a4-4334-84d8-e2a8a7396bf8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.19.0-25-generic N/A
linux-backports-modules-3.19.0-25-generic N/A
linux-firmware 1.143.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/19/2015
dmi.bios.vendor: Insyde
dmi.bios.version: F.26
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 22D6
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 89.23
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnInsyde:bvrF.26:bd01/19/2015:svnHewlett-Packard:pnHPENVY15x360PC:pvr0974100022405F00000420180:rvnHewlett-Packard:rn22D6:rvr89.23:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP ENVY 15 x360 PC
dmi.product.version: 0974100022405F00000420180
dmi.sys.vendor: Hewlett-Packard
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug vivid
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https://bugs.launchpad.net/bugs/1484587
Title:
CPU frequency management fails to re-engage on resume from suspend
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