Did this issue occur in a previous version of Ubuntu, or is this a new issue?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.12 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc3-trusty/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1260112 Title: CPU stuck on minimum frequency after resume from suspend and unplugged Status in “linux” package in Ubuntu: Incomplete Bug description: This happens on a Dell Latitude E6540 (4th gen core i7 CPU). Steps to reproduce: 1) normally boot the computer and make sure everything works as expected (i use the ondemand governor) 2) suspend 3) make the computer is unplugged and resume Expected behavior: cpu should work normally Actual behavior: cpu always stays at minimum frequency (in my case 800 MHz) If i resume from suspend while plugged to the AC charger, everything works as expected. --- ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: gjm 2337 F.... pulseaudio /dev/snd/controlC0: gjm 2337 F.... pulseaudio DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=98df70b7-f534-4ef6-8647-8e98200ccd64 InstallationDate: Installed on 2013-12-06 (4 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: Dell Inc. Latitude E6540 MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb 1 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic.efi.signed root=UUID=22510d0e-a296-4b0f-a97a-27cb89a65419 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10 RelatedPackageVersions: linux-restricted-modules-3.11.0-15-generic N/A linux-backports-modules-3.11.0-15-generic N/A linux-firmware 1.116 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: saucy Uname: Linux 3.11.0-15-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 09/03/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 0725FP dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA05:bd09/03/2013:svnDellInc.:pnLatitudeE6540:pvr01:rvnDellInc.:rn0725FP:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E6540 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1260112/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
