Public bug reported:
When running 14.04 my CPU fan speed increases relative to the CPU
temperature, which keeps the temperature fairly constant.
When running 15.04 or 15.10 the CPU fan speed is locked to the minimum
until the temperature reaches 81 degrees, then it switches to maximum
until the temperature falls below 72 degrees. Then it goes back to the
minimum. This is both annoying and causes unnecessary stress to the
hardware.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-23-generic 4.2.0-23.28
ProcVersionSignature: Ubuntu 4.2.0-23.28-generic 4.2.6
Uname: Linux 4.2.0-23-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed Jan 13 19:13:51 2016
HibernationDevice: RESUME=UUID=5a0bdae5-ddc6-4b6f-aead-360c2949313a
InstallationDate: Installed on 2015-07-12 (185 days ago)
InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
MachineType: System manufacturer System Product Name
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-23-generic
root=UUID=283ec8d4-031f-4703-9de4-8dfe31132378 ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-4.2.0-23-generic N/A
linux-backports-modules-4.2.0-23-generic N/A
linux-firmware 1.149.3
RfKill:
1: hci1: Bluetooth
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-12-31 (12 days ago)
dmi.bios.date: 11/25/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0704
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A79XTD EVO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0X
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr0704:bd11/25/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A79XTDEVO:rvrRevX.0X:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug wily
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https://bugs.launchpad.net/bugs/1533804
Title:
CPU fan speed regression since 15.04
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