The system has high fan speed even when idle. Overall, the fan never gets to a fan speed as low as with the 3.13 kernel.
When running the kernel with intel_pstate=disable, i get much more governor choices, and when selecting "powersave" with this, i get much better behavior, just as with the 3.13 kernel.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.1.0-3-generic 4.1.0-3.3
ProcVersionSignature: Ubuntu 4.1.0-3.3-generic 4.1.3
Uname: Linux 4.1.0-3-generic x86_64
ApportVersion: 2.18-0ubuntu6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: daniel 1764 F.... pulseaudio
CurrentDesktop: XFCE
Date: Thu Aug 13 19:29:31 2015
HibernationDevice: RESUME=UUID=46d75d9b-22b0-497f-b169-c644d6e0df61
InstallationDate: Installed on 2015-02-05 (188 days ago)
InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150205)
MachineType: Dell Inc. Dell System XPS L502X
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.1.0-3-generic root=UUID=2f827672-ff82-4172-b6cc-5235e95473e8 ro quiet splash intel_pstate=disable
RelatedPackageVersions:
linux-restricted-modules-4.1.0-3-generic N/A
linux-backports-modules-4.1.0-3-generic N/A
linux-firmware 1.146
SourcePackage: linux
UpgradeStatus: Upgraded to wily on 2015-05-28 (76 days ago)
dmi.bios.date: 10/20/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0NJT03
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd10/20/2011:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L502X
dmi.sys.vendor: Dell Inc.
I ran the system with intel_pstate=